Update
Muft Shiksha™ एक 100% Free Education Portal है 🇮🇳, जिसका उद्देश्य Class 9–12 के हर विद्यार्थी तक High-Quality Education को पूरी तरह मुफ्त पहुँचाना है। 🇮🇳 हम मानते हैं कि अच्छी शिक्षा किसी student की आर्थिक स्थिति पर निर्भर नहीं होनी चाहिए। 🇮🇳 हर विद्यार्थी को वही Quality Study Material, MCQs, Quizzes, Exam Preparation, Concept-Based Learning और Bilingual Support मिलना चाहिए, जो आमतौर पर महंगी Coaching या Premium Platforms में मिलता है। Muft Shiksha™ 🇮🇳 इसी सोच के साथ बनाया गया है • Muft Shiksha™ एक 100% Free Education Portal है 🇮🇳, जिसका उद्देश्य Class 9–12 के हर विद्यार्थी तक High-Quality Education को पूरी तरह मुफ्त पहुँचाना है। 🇮🇳 हम मानते हैं कि अच्छी शिक्षा किसी student की आर्थिक स्थिति पर निर्भर नहीं होनी चाहिए। 🇮🇳 हर विद्यार्थी को वही Quality Study Material, MCQs, Quizzes, Exam Preparation, Concept-Based Learning और Bilingual Support मिलना चाहिए, जो आमतौर पर महंगी Coaching या Premium Platforms में मिलता है। Muft Shiksha™ 🇮🇳 इसी सोच के साथ बनाया गया है • Muft Shiksha™ एक 100% Free Education Portal है 🇮🇳, जिसका उद्देश्य Class 9–12 के हर विद्यार्थी तक High-Quality Education को पूरी तरह मुफ्त पहुँचाना है। 🇮🇳 हम मानते हैं कि अच्छी शिक्षा किसी student की आर्थिक स्थिति पर निर्भर नहीं होनी चाहिए। 🇮🇳 हर विद्यार्थी को वही Quality Study Material, MCQs, Quizzes, Exam Preparation, Concept-Based Learning और Bilingual Support मिलना चाहिए, जो आमतौर पर महंगी Coaching या Premium Platforms में मिलता है। Muft Shiksha™ 🇮🇳 इसी सोच के साथ बनाया गया है
Subjects

Class 12 Geography Expert Quiz

Level 21 • 50/50 questions • 25 seconds per question.

Level readiness 50/50 Questions
Time Left 20:50 25 sec/question
RewardsCoins + XP
ModeClassic Quiz
Share
Question 1 / 50 0 score
Answered 0/50 Correct 0 Time 20:50

यदि किसी region की population 18 प्रतिशत बढ़ती है और area 8 प्रतिशत घटता है, तो population density लगभग कितने प्रतिशत बढ़ेगी?

If a region's population increases by 18 percent and its area decreases by 8 percent, by approximately what percentage will population density increase?

Explanation opens after your attempt
Correct Answer

C. लगभग 28.3 प्रतिशतAbout 28.3 percent

Explanation

Simple Explanation

मूल density को \(P/A\) मानें। Population 18 प्रतिशत बढ़ने पर multiplier 1.18 और area 8 प्रतिशत घटने पर multiplier 0.92 होगा। नई density \(\frac{1.18P}{0.92A}=1.2826...\frac{P}{A}\) होगी। इसलिए density लगभग 28.3 प्रतिशत बढ़ती है और तीसरा विकल्प सही है। केवल 18 और 8 को जोड़कर 26 प्रतिशत मानना गलत होगा क्योंकि area denominator में है। परीक्षा में combined percentage changes के लिए multiplier method उपयोग करें। / Let the original density be \(P/A\). An 18 percent rise in population gives a multiplier of 1.18, while an 8 percent fall in area gives a multiplier of 0.92. The new density is \(\frac{1.18P}{0.92A}=1.2826...\frac{P}{A}\). Thus density rises by about 28.3 percent, making the third option correct. Simply adding 18 and 8 to obtain 26 percent is incorrect because area is in the denominator. Use the multiplier method for combined percentage changes.

Open Question Page
Ask Friends

यदि population density 20 प्रतिशत घटती है और population 12 प्रतिशत बढ़ती है, तो area लगभग कितने प्रतिशत बढ़ी होगी?

If population density decreases by 20 percent while population increases by 12 percent, by approximately what percentage must area have increased?

Explanation opens after your attempt
Correct Answer

C. 40 प्रतिशत40 percent

Explanation

Simple Explanation

क्योंकि \(Area=\frac{Population}{Density}\), population multiplier 1.12 और density multiplier 0.80 होगा। New area multiplier \(\frac{1.12}{0.80}=1.40\) है। इसका अर्थ area 40 प्रतिशत बढ़ी। इसलिए तीसरा विकल्प सही है। Density decline के साथ population growth तभी संभव है जब area proportionally और अधिक बढ़े। परीक्षा में indirect questions के लिए \(A=P/D\) relation सबसे उपयोगी है। / Since \(Area=\frac{Population}{Density}\), the population multiplier is 1.12 and the density multiplier is 0.80. The new area multiplier is \(\frac{1.12}{0.80}=1.40\). Thus area increased by 40 percent, making the third option correct. A decline in density alongside population growth is possible only when area expands by an even larger proportion. For indirect questions, the relation \(A=P/D\) is especially useful.

Open Question Page
Ask Friends

दो regions की population ratio 8:5 और area ratio 4:3 है। उनकी density ratio क्या होगी?

Two regions have a population ratio of 8:5 and an area ratio of 4:3. What is their density ratio?

Explanation opens after your attempt
Correct Answer

A. 6:5

Explanation

Simple Explanation

Density ratio \(\frac{P_1/A_1}{P_2/A_2}\) से निकलेगा। यहां \(\frac{8/4}{5/3}=2\times\frac{3}{5}=\frac{6}{5}\)। इसलिए density ratio 6:5 है और पहला विकल्प सही है। Population ratio को सीधे density ratio मानना गलत होगा क्योंकि area ratio भी calculation को प्रभावित करता है। परीक्षा में density ratio के लिए population ratio को area ratio से divide करें। / Density ratio is found using \(\frac{P_1/A_1}{P_2/A_2}\). Here \(\frac{8/4}{5/3}=2\times\frac{3}{5}=\frac{6}{5}\). Therefore, the density ratio is 6:5 and the first option is correct. Using the population ratio directly would be incorrect because the area ratio also matters. In examinations, divide the population ratio by the area ratio to obtain density ratio.

Open Question Page
Ask Friends

यदि दो regions की density ratio 7:6 और population ratio 14:9 है, तो area ratio क्या होगा?

If two regions have a density ratio of 7:6 and a population ratio of 14:9, what is their area ratio?

Explanation opens after your attempt
Correct Answer

A. 4:3

Explanation

Simple Explanation

क्योंकि \(Area=Population/Density\), area ratio होगा \(\frac{14}{7}:\frac{9}{6}=2:1.5=4:3\)। इसलिए पहला विकल्प सही है। केवल population ratio को area ratio मानना गलत होगा क्योंकि density difference भी denominator को बदलता है। परीक्षा में area ratio निकालने के लिए population ratio को density ratio से divide करें और फिर simplify करें। / Since \(Area=Population/Density\), the area ratio is \(\frac{14}{7}:\frac{9}{6}=2:1.5=4:3\). Therefore, the first option is correct. Treating the population ratio as the area ratio would be wrong because density differences also affect the denominator. In examinations, divide the population ratio by the density ratio and simplify to obtain area ratio.

Open Question Page
Ask Friends

यदि किसी region की density 840 व्यक्ति प्रति वर्ग किलोमीटर है और population 25 प्रतिशत बढ़ती है जबकि area 16 प्रतिशत बढ़ता है, तो नई density लगभग कितनी होगी?

If a region has a density of 840 persons per square kilometre and population increases by 25 percent while area increases by 16 percent, what is the approximate new density?

Explanation opens after your attempt
Correct Answer

B. 905 व्यक्ति प्रति वर्ग किलोमीटर905 persons per square kilometre

Explanation

Simple Explanation

नई density multiplier \(\frac{1.25}{1.16}=1.077586...\) है। इसलिए new density \(840\times1.077586...\approx905.2\) व्यक्ति प्रति वर्ग किलोमीटर होगी। दूसरा विकल्प सही है। Population growth area growth से थोड़ा अधिक है, इसलिए density बढ़ती है, लेकिन 25 प्रतिशत नहीं। परीक्षा में relative growth rates compare करना महत्वपूर्ण है। / The new density multiplier is \(\frac{1.25}{1.16}=1.077586...\). Therefore, the new density is \(840\times1.077586...\approx905.2\) persons per square kilometre. The second option is correct. Population grows slightly faster than area, so density rises, but not by the full 25 percent. In examinations, compare the relative growth rates of population and area rather than looking at population alone.

Open Question Page
Ask Friends

यदि किसी region की density 600 से बढ़कर 750 व्यक्ति प्रति वर्ग किलोमीटर हो और area 12 प्रतिशत घटे, तो population में लगभग कितना परिवर्तन होगा?

If a region's density rises from 600 to 750 persons per square kilometre while area decreases by 12 percent, what is the approximate change in population?

Explanation opens after your attempt
Correct Answer

A. 10 प्रतिशत बढ़ेगीIncrease by 10 percent

Explanation

Simple Explanation

Density multiplier \(750/600=1.25\) है और area multiplier 0.88 है। क्योंकि \(Population=Density\times Area\), population multiplier \(1.25\times0.88=1.10\) होगा। इसलिए population 10 प्रतिशत बढ़ी और पहला विकल्प सही है। केवल density increase देखकर 25 प्रतिशत population growth मानना गलत होगा क्योंकि area साथ में घटा है। / The density multiplier is \(750/600=1.25\), while the area multiplier is 0.88. Since \(Population=Density\times Area\), the population multiplier is \(1.25\times0.88=1.10\). Thus population increased by 10 percent, making the first option correct. Assuming a 25 percent population increase from the density change alone would be wrong because area also decreased.

Open Question Page
Ask Friends

यदि किसी city की gross density 540 व्यक्ति प्रति वर्ग किलोमीटर है और residential land total municipal area का 45 प्रतिशत है, तो all residents residential land पर रहने की स्थिति में net residential density कितनी होगी?

If a city's gross density is 540 persons per square kilometre and residential land is 45 percent of total municipal area, what is the net residential density if all residents live on residential land?

Explanation opens after your attempt
Correct Answer

C. 1200 व्यक्ति प्रति वर्ग किलोमीटर1200 persons per square kilometre

Explanation

Simple Explanation

Gross density \(P/A=540\) है और residential area \(0.45A\) है। इसलिए net residential density \(P/(0.45A)=540/0.45=1200\) व्यक्ति प्रति वर्ग किलोमीटर होगी। तीसरा विकल्प सही है। Residential denominator छोटा होने से net density gross density से अधिक होती है। परीक्षा में gross and net density के denominator का difference ध्यान से समझें। / Gross density is \(P/A=540\), while residential area is \(0.45A\). Therefore, net residential density is \(P/(0.45A)=540/0.45=1200\) persons per square kilometre. The third option is correct. Because the residential denominator is smaller, net density is higher than gross density. In examinations, carefully distinguish the denominator used in gross and net density calculations.

Open Question Page
Ask Friends

यदि किसी region का 28 प्रतिशत area uninhabitable है और arithmetic density 288 व्यक्ति प्रति वर्ग किलोमीटर है, तो habitable-area density कितनी होगी?

If 28 percent of a region's area is uninhabitable and its arithmetic density is 288 persons per square kilometre, what is the density over the habitable area?

Explanation opens after your attempt
Correct Answer

B. 400 व्यक्ति प्रति वर्ग किलोमीटर400 persons per square kilometre

Explanation

Simple Explanation

Habitable area total area का 72 प्रतिशत है। इसलिए habitable-area density \(288/0.72=400\) व्यक्ति प्रति वर्ग किलोमीटर होगी। दूसरा विकल्प सही है। Arithmetic density पूरे area को denominator में रखती है, जबकि habitable density केवल usable settlement area use करती है। इसलिए habitable density अधिक होती है। परीक्षा में denominator definition पढ़ना आवश्यक है। / Habitable area is 72 percent of total area. Therefore, density over habitable land is \(288/0.72=400\) persons per square kilometre. The second option is correct. Arithmetic density uses the whole area as the denominator, while habitable density uses only usable settlement land. This makes habitable density higher. In examinations, always identify the denominator definition carefully.

Open Question Page
Ask Friends

यदि किसी city की daytime population 1500000 और resident population 1000000 है तथा area 625 वर्ग किलोमीटर है, तो daytime density resident density से कितनी अधिक है?

If a city has a daytime population of 1500000 and a resident population of 1000000 over 625 square kilometres, by how much does daytime density exceed resident density?

Explanation opens after your attempt
Correct Answer

C. 800 व्यक्ति प्रति वर्ग किलोमीटर800 persons per square kilometre

Explanation

Simple Explanation

Daytime density \(1500000/625=2400\) और resident density \(1000000/625=1600\) व्यक्ति प्रति वर्ग किलोमीटर है। Difference \(2400-1600=800\) है। इसलिए तीसरा विकल्प सही है। यह commuting and daily inflow के कारण functional density और residential density के बीच अंतर दिखाता है। परीक्षा में दोनों populations को same area से divide करें। / Daytime density is \(1500000/625=2400\), while resident density is \(1000000/625=1600\) persons per square kilometre. The difference is \(2400-1600=800\). Therefore, the third option is correct. This shows the effect of commuting and daily inflow on functional versus residential density. In examinations, divide both population measures by the same area before comparing them.

Open Question Page
Ask Friends

यदि resident density 900 और daytime density 1260 व्यक्ति प्रति वर्ग किलोमीटर है, तो daytime density resident density से कितने प्रतिशत अधिक है?

If resident density is 900 and daytime density is 1260 persons per square kilometre, by what percentage is daytime density higher?

Explanation opens after your attempt
Correct Answer

C. 40 प्रतिशत40 percent

Explanation

Simple Explanation

Difference \(1260-900=360\) है। Percentage increase resident density के relative \(\frac{360}{900}\times100=40\%\) है। इसलिए तीसरा विकल्प सही है। 360 absolute difference है, percentage नहीं। परीक्षा में percentage higher questions में reference value denominator में होती है, यहां resident density। / The difference is \(1260-900=360\). Percentage increase relative to resident density is \(\frac{360}{900}\times100=40\%\). Therefore, the third option is correct. The value 360 is the absolute difference, not a percentage. In examinations, for percent-higher questions, the reference value belongs in the denominator, here the resident density.

Open Question Page
Ask Friends

यदि किसी region की average density 210 है और total population का 48 प्रतिशत केवल 16 प्रतिशत area में रहता है, तो उस portion की density कितनी होगी?

If a region's average density is 210 and 48 percent of total population lives in only 16 percent of the area, what is the density of that portion?

Explanation opens after your attempt
Correct Answer

B. 630 व्यक्ति प्रति वर्ग किलोमीटर630 persons per square kilometre

Explanation

Simple Explanation

Selected portion की relative density \(\frac{0.48}{0.16}=3\) times regional average है। इसलिए density \(210\times3=630\) व्यक्ति प्रति वर्ग किलोमीटर होगी। दूसरा विकल्प सही है। Population share area share से तीन गुना है, इसलिए local density भी regional average की तीन गुना है। परीक्षा में spatial concentration questions में population share को area share से divide करें। / The selected portion has relative density \(\frac{0.48}{0.16}=3\) times the regional average. Therefore, its density is \(210\times3=630\) persons per square kilometre. The second option is correct. Because the population share is three times the area share, local density is also three times the regional average. In examinations, divide population share by area share in spatial-concentration questions.

Open Question Page
Ask Friends

यदि total population का 36 प्रतिशत total area के 12 प्रतिशत में और बाकी population शेष area में रहती है, तो first portion remaining portion से कितनी गुना dense है?

If 36 percent of total population lives in 12 percent of total area and the rest lives in the remaining area, how many times denser is the first portion than the remainder?

Explanation opens after your attempt
Correct Answer

B. 4.125 गुना4.125 times

Explanation

Simple Explanation

First portion की relative density \(0.36/0.12=3\) है। Remaining portion में 64 percent population 88 percent area में है, इसलिए relative density \(0.64/0.88=0.72727...\) है। Ratio \(3/0.72727...\approx4.125\) है। इसलिए दूसरा विकल्प सही है। यहां regional average से नहीं बल्कि remaining portion से comparison पूछा गया है। / The first portion has relative density \(0.36/0.12=3\). The remainder contains 64 percent of the population in 88 percent of the area, giving relative density \(0.64/0.88=0.72727...\). Their ratio is \(3/0.72727...\approx4.125\). Therefore, the second option is correct. The comparison is with the remaining portion, not with the regional average.

Open Question Page
Ask Friends

यदि 72 प्रतिशत population 30 प्रतिशत area में रहती है, तो उस area की density regional average की कितनी गुना होगी?

If 72 percent of the population lives in 30 percent of the area, how many times the regional average is the density of that area?

Explanation opens after your attempt
Correct Answer

C. 2.4 गुना2.4 times

Explanation

Simple Explanation

Relative density \(\frac{0.72}{0.30}=2.4\) है। इसलिए selected area की density regional average की 2.4 times होगी और तीसरा विकल्प सही है। Exact total population or total area जानना जरूरी नहीं है क्योंकि proportions sufficient हैं। यह spatial concentration की intensity measure करने का आसान तरीका है। / Relative density is \(\frac{0.72}{0.30}=2.4\). Therefore, the selected area's density is 2.4 times the regional average and the third option is correct. Exact values of total population or area are not required because proportional shares are sufficient. This is a useful method for measuring the intensity of spatial concentration.

Open Question Page
Ask Friends

यदि किसी region की density 768 व्यक्ति प्रति वर्ग किलोमीटर है और area 1250 वर्ग किलोमीटर है, तो total population कितनी होगी?

If a region has a density of 768 persons per square kilometre and an area of 1250 square kilometres, what is its total population?

Explanation opens after your attempt
Correct Answer

C. 960000

Explanation

Simple Explanation

Population \(=Density\times Area\) है। इसलिए \(768\times1250=960000\) people। तीसरा विकल्प सही है। इसे \(768\times1000 + 768\times250\) के रूप में भी verify किया जा सकता है। परीक्षा में large-number calculations के लिए stepwise multiplication और reverse checking उपयोगी है। / Population equals density multiplied by area. Therefore, \(768\times1250=960000\) people. The third option is correct. The result can also be verified by splitting the multiplication into \(768\times1000\) and \(768\times250\). In examinations, stepwise multiplication and reverse checking are useful for large-number calculations.

Open Question Page
Ask Friends

यदि population 1170000 और area 1560 वर्ग किलोमीटर हो, तो density कितनी होगी?

If population is 1170000 and area is 1560 square kilometres, what is the density?

Explanation opens after your attempt
Correct Answer

C. 750 व्यक्ति प्रति वर्ग किलोमीटर750 persons per square kilometre

Explanation

Simple Explanation

Population density \(1170000/1560 = 750\) व्यक्ति प्रति वर्ग किलोमीटर है। इसलिए तीसरा विकल्प सही है। Verification के लिए \(750\times1560=1170000\) मिलता है। Hard numerical questions में division के बाद multiplication से checking error कम करती है। Final unit persons per square kilometre लिखना जरूरी है। / Population density is \(1170000/1560=750\) persons per square kilometre. Therefore, the third option is correct. Verification gives \(750\times1560=1170000\). In harder numerical questions, checking division through multiplication helps reduce errors. The final answer should include the unit persons per square kilometre.

Open Question Page
Ask Friends

यदि किसी region की density 625 और area 1440 वर्ग किलोमीटर है, फिर population 90000 बढ़ती है और area unchanged रहता है, तो new density कितनी होगी?

If a region has a density of 625 and an area of 1440 square kilometres, then population increases by 90000 while area remains unchanged, what is the new density?

Explanation opens after your attempt
Correct Answer

C. 687.5 व्यक्ति प्रति वर्ग किलोमीटर687.5 persons per square kilometre

Explanation

Simple Explanation

Original population \(625\times1440=900000\) है। New population \(900000+90000=990000\) होगी। Area 1440 square kilometres unchanged है, इसलिए new density \(990000/1440=687.5\) व्यक्ति प्रति वर्ग किलोमीटर होगी। तीसरा विकल्प सही है। यह multi-step calculation है जिसमें original population पहले निकालना आवश्यक है। / Original population is \(625\times1440=900000\). New population becomes \(900000+90000=990000\). With area unchanged at 1440 square kilometres, new density is \(990000/1440=687.5\) persons per square kilometre. Therefore, the third option is correct. This is a multi-step calculation in which the original population must first be determined.

Open Question Page
Ask Friends

यदि किसी region की density 520 और area 2500 वर्ग किलोमीटर है, फिर 260000 लोग बाहर migrate करें, तो area unchanged रहने पर new density क्या होगी?

If a region has a density of 520 and an area of 2500 square kilometres, then 260000 people migrate out. What is the new density if area remains unchanged?

Explanation opens after your attempt
Correct Answer

C. 416 व्यक्ति प्रति वर्ग किलोमीटर416 persons per square kilometre

Explanation

Simple Explanation

Original population \(520\times2500=1300000\) है। Out-migration के बाद population \(1300000-260000=1040000\) होगी। New density \(1040000/2500=416\) व्यक्ति प्रति वर्ग किलोमीटर है। इसलिए तीसरा विकल्प सही है। Fixed area में population decline density को reduce करती है। / Original population is \(520\times2500=1300000\). After out-migration, population becomes \(1300000-260000=1040000\). New density is \(1040000/2500=416\) persons per square kilometre. Therefore, the third option is correct. With fixed area, a population decline reduces density.

Open Question Page
Ask Friends

यदि density 480 से बढ़कर 600 व्यक्ति प्रति वर्ग किलोमीटर हो और area 15 प्रतिशत बढ़े, तो population कितने प्रतिशत बढ़ी?

If density rises from 480 to 600 persons per square kilometre while area increases by 15 percent, by what percentage did population increase?

Explanation opens after your attempt
Correct Answer

C. 43.75 प्रतिशत43.75 percent

Explanation

Simple Explanation

Density multiplier \(600/480=1.25\) है और area multiplier 1.15 है। इसलिए population multiplier \(1.25\times1.15=1.4375\) होगा। Population 43.75 percent बढ़ी और तीसरा विकल्प सही है। केवल density rise 25 percent को population growth मानना गलत होगा क्योंकि area भी बढ़ी है। / The density multiplier is \(600/480=1.25\), while the area multiplier is 1.15. Therefore, the population multiplier is \(1.25\times1.15=1.4375\). Population increased by 43.75 percent, so the third option is correct. It would be wrong to treat the 25 percent density rise as the population increase because area also expanded.

Open Question Page
Ask Friends

यदि density 700 से घटकर 560 हो और population 5 प्रतिशत बढ़े, तो area लगभग कितने प्रतिशत बढ़ी?

If density falls from 700 to 560 while population increases by 5 percent, by approximately what percentage did area increase?

Explanation opens after your attempt
Correct Answer

C. 31.25 प्रतिशत31.25 percent

Explanation

Simple Explanation

Density multiplier \(560/700=0.8\) है और population multiplier 1.05 है। Area multiplier \(1.05/0.8=1.3125\) होगा। इसलिए area 31.25 percent बढ़ी और तीसरा विकल्प सही है। Density decline के बावजूद population growth तभी संभव है जब area उससे काफी अधिक बढ़े। / The density multiplier is \(560/700=0.8\), while the population multiplier is 1.05. The area multiplier is \(1.05/0.8=1.3125\). Therefore, area increased by 31.25 percent and the third option is correct. A density decline despite population growth requires area to expand by a substantially greater proportion.

Open Question Page
Ask Friends

यदि population 22 प्रतिशत घटती है लेकिन density 4 प्रतिशत बढ़ती है, तो area में लगभग कितना परिवर्तन हुआ?

If population decreases by 22 percent while density increases by 4 percent, what approximate change occurred in area?

Explanation opens after your attempt
Correct Answer

A. 25 प्रतिशत घटाDecreased by 25 percent

Explanation

Simple Explanation

Population multiplier 0.78 और density multiplier 1.04 है। Area multiplier \(0.78/1.04=0.75\) है। इसलिए area exactly 25 percent घटा और पहला विकल्प सही है। Population decline के साथ density increase होना तभी संभव है जब area उससे भी अधिक proportion में contract करे। / Population multiplier is 0.78 and density multiplier is 1.04. The area multiplier is \(0.78/1.04=0.75\). Therefore, area decreased by exactly 25 percent and the first option is correct. A rise in density alongside population decline is possible only when area contracts by a larger proportion.

Open Question Page
Ask Friends

यदि किसी city की gross density 420 है और land-only density 560 व्यक्ति प्रति वर्ग किलोमीटर है, तो water bodies total municipal area का कितना प्रतिशत हैं?

If a city's gross density is 420 and its land-only density is 560 persons per square kilometre, what percentage of total municipal area consists of water bodies?

Explanation opens after your attempt
Correct Answer

B. 25 प्रतिशत25 percent

Explanation

Simple Explanation

Gross density \(P/A=420\) और land-only density \(P/L=560\) है। इसलिए \(L/A=420/560=0.75\)। Land total area का 75 percent है, इसलिए water bodies remaining 25 percent हैं। दूसरा विकल्प सही है। Density differences से area composition infer की जा सकती है जब numerator population same हो। / Gross density is \(P/A=420\), while land-only density is \(P/L=560\). Thus \(L/A=420/560=0.75\). Land occupies 75 percent of total area, so water bodies occupy the remaining 25 percent. Therefore, the second option is correct. When the same population is used as the numerator, density differences can reveal area composition.

Open Question Page
Ask Friends

यदि किसी region की arithmetic density 225 और habitable-area density 375 व्यक्ति प्रति वर्ग किलोमीटर है, तो habitable area total area का कितना प्रतिशत है?

If a region's arithmetic density is 225 and habitable-area density is 375 persons per square kilometre, what percentage of total area is habitable?

Explanation opens after your attempt
Correct Answer

B. 60 प्रतिशत60 percent

Explanation

Simple Explanation

Arithmetic density \(P/A=225\) और habitable density \(P/H=375\) है। Therefore \(H/A=225/375=0.60\)। Habitable area total area का 60 percent है। इसलिए दूसरा विकल्प सही है। Remaining 40 percent area uninhabitable or effectively unused माना गया है under the question's assumption। / Arithmetic density is \(P/A=225\), while habitable-area density is \(P/H=375\). Therefore, \(H/A=225/375=0.60\). Habitable area is 60 percent of total area, making the second option correct. Under the question's assumption, the remaining 40 percent is uninhabitable or effectively unused for settlement.

Open Question Page
Ask Friends

यदि cultivated-land density arithmetic density की 2.5 गुना है, तो cultivated land total area का कितना प्रतिशत है?

If density relative to cultivated land is 2.5 times the arithmetic density, what percentage of total area is cultivated?

Explanation opens after your attempt
Correct Answer

B. 40 प्रतिशत40 percent

Explanation

Simple Explanation

Arithmetic density \(P/A\) और cultivated density \(P/C\) है। यदि \(P/C=2.5(P/A)\), तो \(A/C=2.5\), इसलिए \(C/A=1/2.5=0.4\)। Cultivated land total area का 40 percent है। इसलिए दूसरा विकल्प सही है। यह denominator ratio का direct application है। / Arithmetic density is \(P/A\), while cultivated-land density is \(P/C\). If \(P/C=2.5(P/A)\), then \(A/C=2.5\), so \(C/A=1/2.5=0.4\). Cultivated land is therefore 40 percent of total area. The second option is correct. This is a direct application of the relationship between density and denominator size.

Open Question Page
Ask Friends

यदि किसी region की arithmetic density 192 है और cultivated land total area का 24 प्रतिशत है, तो cultivated-land density कितनी होगी?

If a region's arithmetic density is 192 and cultivated land is 24 percent of total area, what is the density relative to cultivated land?

Explanation opens after your attempt
Correct Answer

C. 800 व्यक्ति प्रति वर्ग किलोमीटर800 persons per square kilometre

Explanation

Simple Explanation

Cultivated land \(0.24A\) है। इसलिए cultivated-land density \(192/0.24=800\) व्यक्ति प्रति वर्ग किलोमीटर cultivated land होगी। तीसरा विकल्प सही है। Arithmetic density पूरे land area पर average है, जबकि cultivated-land density productive land पर population pressure दिखाती है। इसलिए दोनों values में बड़ा अंतर हो सकता है। / Cultivated land is \(0.24A\). Therefore, density relative to cultivated land is \(192/0.24=800\) persons per square kilometre of cultivated land. The third option is correct. Arithmetic density averages population over all land, while cultivated-land density reflects pressure on productive land. The two values can therefore differ substantially.

Open Question Page
Ask Friends

यदि किसी region में arithmetic density 140 है लेकिन cultivated-land density 700 है, तो cultivated land total area का कितना प्रतिशत है?

If a region has an arithmetic density of 140 but a cultivated-land density of 700, what percentage of total area is cultivated?

Explanation opens after your attempt
Correct Answer

B. 20 प्रतिशत20 percent

Explanation

Simple Explanation

Arithmetic density \(P/A=140\) और cultivated density \(P/C=700\) है। इसलिए \(C/A=140/700=0.20\)। Cultivated land total area का 20 percent है। दूसरा विकल्प सही है। High cultivated-land density limited productive land पर strong population pressure का संकेत दे सकती है even when arithmetic density moderate हो। / Arithmetic density is \(P/A=140\), while cultivated-land density is \(P/C=700\). Therefore, \(C/A=140/700=0.20\). Cultivated land is 20 percent of total area, making the second option correct. A high cultivated-land density can indicate strong population pressure on limited productive land even when arithmetic density is moderate.

Open Question Page
Ask Friends

यदि किसी region की density 40 प्रतिशत बढ़ती है जबकि population unchanged है, तो area original का कितना प्रतिशत रह जाएगा?

If a region's density increases by 40 percent while population remains unchanged, what percentage of the original area remains?

Explanation opens after your attempt
Correct Answer

B. 71.4 प्रतिशत71.4 percent

Explanation

Simple Explanation

Population constant और density multiplier 1.40 है। इसलिए area multiplier \(1/1.40=0.714285...\) है। अर्थात new area original का लगभग 71.4 percent है। दूसरा विकल्प सही है। Area लगभग 28.6 percent घटा। 40 percent density rise को 40 percent area decline मानना inverse relationship को गलत apply करना होगा। / Population is constant and the density multiplier is 1.40. Therefore, the area multiplier is \(1/1.40=0.714285...\). The new area is about 71.4 percent of the original. The second option is correct. Area decreased by about 28.6 percent. Treating a 40 percent density rise as a 40 percent area decline would misuse the inverse relationship.

Open Question Page
Ask Friends

यदि population 54 प्रतिशत बढ़े और area 40 प्रतिशत बढ़े, तो density कितने प्रतिशत बढ़ेगी?

If population increases by 54 percent and area increases by 40 percent, by what percentage will density increase?

Explanation opens after your attempt
Correct Answer

B. 10 प्रतिशत10 percent

Explanation

Simple Explanation

New density multiplier \(\frac{1.54}{1.40}=1.10\) है। इसलिए density exactly 10 percent बढ़ती है और दूसरा विकल्प सही है। Population growth area growth से केवल relatively थोड़ा अधिक है, इसलिए density increase भी limited है। Combined percentage changes में direct subtraction 54 minus 40 equals 14 percent देना गलत होगा। / The new density multiplier is \(\frac{1.54}{1.40}=1.10\). Therefore, density increases by exactly 10 percent and the second option is correct. Population grows only modestly faster than area, so density rises by a limited amount. Directly subtracting 40 from 54 to obtain 14 percent would be incorrect for this ratio-based change.

Open Question Page
Ask Friends

यदि population 36 प्रतिशत घटे और area 20 प्रतिशत घटे, तो density कितने प्रतिशत घटेगी?

If population decreases by 36 percent and area decreases by 20 percent, by what percentage will density decrease?

Explanation opens after your attempt
Correct Answer

B. 20 प्रतिशत20 percent

Explanation

Simple Explanation

Population multiplier 0.64 और area multiplier 0.80 है। New density multiplier \(0.64/0.80=0.80\) है। इसलिए density 20 percent घटती है और दूसरा विकल्प सही है। Population area से अधिक proportion में घट रही है, इसलिए persons per unit area भी कम होते हैं। / Population multiplier is 0.64 and area multiplier is 0.80. The new density multiplier is \(0.64/0.80=0.80\). Therefore, density decreases by 20 percent and the second option is correct. Population falls by a larger proportion than area, so the number of persons per unit area declines.

Open Question Page
Ask Friends

यदि population 8 प्रतिशत बढ़े और density 10 प्रतिशत घटे, तो area लगभग कितने प्रतिशत बढ़ा?

If population increases by 8 percent while density decreases by 10 percent, by approximately what percentage did area increase?

Explanation opens after your attempt
Correct Answer

C. 20 प्रतिशत20 percent

Explanation

Simple Explanation

Area multiplier \(\frac{1.08}{0.90}=1.20\) है। इसलिए area 20 percent बढ़ा और तीसरा विकल्प सही है। Population increase के बावजूद density decline होने का अर्थ है कि denominator area population से faster expand हुआ। ऐसे indirect proportional questions में \(A=P/D\) relation directly use करें। / Area multiplier is \(\frac{1.08}{0.90}=1.20\). Therefore, area increased by 20 percent and the third option is correct. A density decline despite population growth means the denominator, area, expanded faster than population. For indirect proportional questions, use the relation \(A=P/D\) directly.

Open Question Page
Ask Friends

यदि density unchanged है और population 240000 से 324000 हो जाती है, तो area में कितने प्रतिशत वृद्धि हुई?

If density remains unchanged while population rises from 240000 to 324000, by what percentage did area increase?

Explanation opens after your attempt
Correct Answer

C. 35 प्रतिशत35 percent

Explanation

Simple Explanation

Population increase \(324000-240000=84000\) है। Percentage increase \(\frac{84000}{240000}\times100=35\%\) है। Density unchanged होने के लिए area को भी exactly 35 percent बढ़ना होगा। इसलिए तीसरा विकल्प सही है। Constant density का अर्थ population and area का same proportional change है। / Population increases by \(324000-240000=84000\). Percentage increase is \(\frac{84000}{240000}\times100=35\%\). For density to remain unchanged, area must also increase by exactly 35 percent. Therefore, the third option is correct. Constant density means population and area change by the same proportion.

Open Question Page
Ask Friends

यदि किसी city का area 1200 वर्ग किलोमीटर और population 840000 है, फिर boundary expansion के बाद area 1400 हो जाए और 70000 residents जुड़ें, तो new density कितनी होगी?

If a city has an area of 1200 square kilometres and a population of 840000, then after boundary expansion its area becomes 1400 and 70000 residents are added, what is the new density?

Explanation opens after your attempt
Correct Answer

B. 650 व्यक्ति प्रति वर्ग किलोमीटर650 persons per square kilometre

Explanation

Simple Explanation

New population \(840000+70000=910000\) है। New area 1400 square kilometres है। इसलिए new density \(910000/1400=650\) व्यक्ति प्रति वर्ग किलोमीटर होगी। दूसरा विकल्प सही है। Original density 700 थी, इसलिए residents बढ़ने के बावजूद area proportionally अधिक expand होने से density घटती है। / New population is \(840000+70000=910000\), and new area is 1400 square kilometres. Therefore, new density is \(910000/1400=650\) persons per square kilometre. The second option is correct. Original density was 700, so despite additional residents, density falls because area expands by a larger proportion.

Open Question Page
Ask Friends

यदि किसी region की density 360 और दूसरे की 540 व्यक्ति प्रति वर्ग किलोमीटर है, तो lower density higher density की कितने प्रतिशत है?

If one region has density 360 and another has 540 persons per square kilometre, what percentage of the higher density is the lower density?

Explanation opens after your attempt
Correct Answer

B. 66.7 प्रतिशत66.7 percent

Explanation

Simple Explanation

Required percentage \(\frac{360}{540}\times100=66.666...\%\) है। इसलिए लगभग 66.7 percent और दूसरा विकल्प सही है। यह percentage difference नहीं बल्कि one value as a percentage of another पूछता है। यदि पूछा जाता कि 540, 360 से कितने percent अधिक है, answer 50 percent होता। / The required percentage is \(\frac{360}{540}\times100=66.666...\%\), or about 66.7 percent. Therefore, the second option is correct. This asks for one value as a percentage of another, not percentage difference. If the question asked how much greater 540 is than 360, the answer would instead be 50 percent.

Open Question Page
Ask Friends

यदि Region B की density Region A से 75 प्रतिशत अधिक है और A की density 280 है, तो B की density कितनी होगी?

If Region B's density is 75 percent higher than Region A's density of 280, what is B's density?

Explanation opens after your attempt
Correct Answer

C. 490 व्यक्ति प्रति वर्ग किलोमीटर490 persons per square kilometre

Explanation

Simple Explanation

B की density A से 75 percent अधिक है, इसलिए \(280\times1.75=490\) व्यक्ति प्रति वर्ग किलोमीटर। तीसरा विकल्प सही है। 75 को directly 280 में add करना गलत होगा क्योंकि 75 percentage है। परीक्षा में percent higher का multiplier \(1+\frac{75}{100}=1.75\) use करें। / B's density is 75 percent higher than A's, so \(280\times1.75=490\) persons per square kilometre. Therefore, the third option is correct. Adding 75 directly to 280 would be wrong because 75 is a percentage. In examinations, use the multiplier \(1+\frac{75}{100}=1.75\) for a value that is 75 percent higher.

Open Question Page
Ask Friends

यदि Region A की density Region B से 36 प्रतिशत कम है और A की density 320 है, तो B की density कितनी होगी?

If Region A's density is 36 percent lower than Region B's and A's density is 320, what is B's density?

Explanation opens after your attempt
Correct Answer

C. 500 व्यक्ति प्रति वर्ग किलोमीटर500 persons per square kilometre

Explanation

Simple Explanation

यदि A, B से 36 percent कम है तो \(A=0.64B\)। Given \(A=320\), इसलिए \(B=320/0.64=500\) व्यक्ति प्रति वर्ग किलोमीटर। तीसरा विकल्प सही है। 320 में 36 percent add करना गलत होगा क्योंकि percentage का base B है, A नहीं। यह reference-base reasoning का महत्वपूर्ण example है। / If A is 36 percent less than B, then \(A=0.64B\). Given \(A=320\), \(B=320/0.64=500\) persons per square kilometre. Therefore, the third option is correct. Adding 36 percent directly to 320 would be wrong because the percentage is based on B, not A. This is an important example of correctly identifying the reference base.

Open Question Page
Ask Friends

यदि density original की 125 प्रतिशत और area original की 96 प्रतिशत हो जाए, तो population original की कितने प्रतिशत होगी?

If density becomes 125 percent of the original and area becomes 96 percent of the original, what percentage of the original population will remain?

Explanation opens after your attempt
Correct Answer

C. 120 प्रतिशत120 percent

Explanation

Simple Explanation

Population \(=Density\times Area\)। इसलिए population multiplier \(1.25\times0.96=1.20\) है। Population original की 120 percent होगी, अर्थात 20 percent increase। इसलिए तीसरा विकल्प सही है। Density increase और area decrease दोनों को combine करना जरूरी है; केवल density change देखकर population change नहीं निकाला जा सकता। / Population equals density multiplied by area. Therefore, the population multiplier is \(1.25\times0.96=1.20\). Population becomes 120 percent of the original, an increase of 20 percent. The third option is correct. Both density and area changes must be combined; population change cannot be inferred from density alone.

Open Question Page
Ask Friends

यदि density original की 84 प्रतिशत और area original की 125 प्रतिशत हो जाए, तो population original की कितने प्रतिशत होगी?

If density becomes 84 percent of the original and area becomes 125 percent of the original, what percentage of the original population will it have?

Explanation opens after your attempt
Correct Answer

C. 105 प्रतिशत105 percent

Explanation

Simple Explanation

Population multiplier \(0.84\times1.25=1.05\) है। इसलिए population original की 105 percent होगी, अर्थात 5 percent वृद्धि। तीसरा विकल्प सही है। Density decline के बावजूद population बढ़ सकती है यदि area sufficiently increase करे। यह total population और density के conceptual difference को स्पष्ट करता है। / The population multiplier is \(0.84\times1.25=1.05\). Therefore, population becomes 105 percent of the original, an increase of 5 percent. The third option is correct. Population can rise despite a decline in density if area increases sufficiently. This clearly illustrates the conceptual difference between total population and density.

Open Question Page
Ask Friends

यदि किसी city की arithmetic density बढ़ती है जबकि total population unchanged रहती है, तो कौन-सी स्थिति mathematically इसे समझाती है?

If a city's arithmetic density increases while total population remains unchanged, which situation mathematically explains it?

Explanation opens after your attempt
Correct Answer

A. Calculated area घट गया होThe calculated area has decreased

Explanation

Simple Explanation

Density \(P/A\) है। Population unchanged रहते हुए density बढ़ने के लिए denominator area को घटना होगा। यह boundary contraction, area reclassification या water-area exclusion जैसी स्थिति से हो सकता है। इसलिए पहला विकल्प सही है। Population unchanged होने की condition में density increase को population growth से explain नहीं किया जा सकता। / Density is \(P/A\). With population unchanged, density can rise only if the denominator, area, decreases. This may occur through boundary contraction, area reclassification, or exclusion of water area. Therefore, the first option is correct. Under the stated condition of unchanged population, density increase cannot be explained by population growth.

Open Question Page
Ask Friends

यदि density घटती है और area भी घटती है, तो population के बारे में कौन-सा conclusion आवश्यक है?

If density decreases while area also decreases, which conclusion about population is necessary?

Explanation opens after your attempt
Correct Answer

A. Population proportionally area से अधिक घटती हैPopulation decreases proportionally more than area

Explanation

Simple Explanation

Density \(P/A\) है। यदि area decrease के बावजूद density भी decrease करती है, तो population को area से भी अधिक proportion में decline करना होगा। Otherwise smaller denominator density को upward push करता। इसलिए पहला विकल्प सही है। यह ratio direction reasoning का advanced application है। / Density is \(P/A\). If density decreases even though area also decreases, population must have fallen by a larger proportion than area. Otherwise, the smaller denominator would tend to push density upward. Therefore, the first option is correct. This is an advanced application of ratio-direction reasoning.

Open Question Page
Ask Friends

यदि किसी city की municipal area unchanged रहे लेकिन daytime population 30 प्रतिशत बढ़े और resident population 10 प्रतिशत घटे, तो daytime-to-resident density ratio में क्या effect होगा?

If a city's municipal area remains unchanged while daytime population rises by 30 percent and resident population falls by 10 percent, what happens to the daytime-to-resident density ratio?

Explanation opens after your attempt
Correct Answer

B. Ratio लगभग 1.44 गुना होगाRatio becomes about 1.44 times

Explanation

Simple Explanation

Same area होने के कारण density ratio population ratio change के बराबर होगा। Daytime multiplier 1.30 और resident multiplier 0.90 है। इसलिए new daytime-to-resident density ratio relative to old ratio \(\frac{1.30}{0.90}=1.444...\) times होगा। दूसरा विकल्प सही है। यह functional population pressure के बढ़ने को दर्शाता है। / Because both densities use the same unchanged area, the change in their ratio equals the change in the corresponding population ratio. Daytime population multiplier is 1.30 and resident population multiplier is 0.90. Thus the new daytime-to-resident density ratio is \(\frac{1.30}{0.90}=1.444...\) times the old ratio. Therefore, the second option is correct.

Open Question Page
Ask Friends

यदि resident density 1200 और daytime density 1800 व्यक्ति प्रति वर्ग किलोमीटर है, तो resident density daytime density की कितने प्रतिशत है?

If resident density is 1200 and daytime density is 1800 persons per square kilometre, what percentage of daytime density is resident density?

Explanation opens after your attempt
Correct Answer

B. 66.7 प्रतिशत66.7 percent

Explanation

Simple Explanation

Required percentage \(\frac{1200}{1800}\times100=66.666...\%\) है। इसलिए resident density daytime density की लगभग 66.7 percent है और दूसरा विकल्प सही है। यह percentage-of comparison है, percentage difference नहीं। यदि पूछा जाता daytime density resident से कितने percent अधिक है, answer 50 percent होता। / The required percentage is \(\frac{1200}{1800}\times100=66.666...\%\). Therefore, resident density is about 66.7 percent of daytime density and the second option is correct. This is a percentage-of comparison, not a percentage-difference question. If asked how much higher daytime density is than resident density, the answer would be 50 percent.

Open Question Page
Ask Friends

यदि किसी region में 80 प्रतिशत population 50 प्रतिशत area में रहती है, तो remaining portion की density regional average की कितनी गुना होगी?

If 80 percent of a region's population lives in 50 percent of its area, how many times the regional average is the density of the remaining portion?

Explanation opens after your attempt
Correct Answer

B. 0.4 गुना0.4 times

Explanation

Simple Explanation

Remaining portion में 20 percent population 50 percent area में रहती है। इसलिए relative density \(0.20/0.50=0.4\) times regional average है। दूसरा विकल्प सही है। First portion की density \(0.80/0.50=1.6\) times average होगी। यह internal concentration contrast को स्पष्ट करता है। / The remaining portion contains 20 percent of the population in 50 percent of the area. Its relative density is therefore \(0.20/0.50=0.4\) times the regional average. The second option is correct. The first portion has density \(0.80/0.50=1.6\) times the average, showing a strong internal concentration contrast.

Open Question Page
Ask Friends

यदि किसी region की arithmetic density 250 है और cultivated land total area का 20 प्रतिशत है, तो cultivated-land density कितनी होगी?

If a region's arithmetic density is 250 and cultivated land is 20 percent of total area, what is the density relative to cultivated land?

Explanation opens after your attempt
Correct Answer

C. 1250 व्यक्ति प्रति वर्ग किलोमीटर1250 persons per square kilometre

Explanation

Simple Explanation

Cultivated land \(0.20A\) है। इसलिए cultivated-land density \(250/0.20=1250\) व्यक्ति प्रति वर्ग किलोमीटर cultivated land होगी। तीसरा विकल्प सही है। यह arithmetic density से पांच गुना है क्योंकि productive land total area का केवल one-fifth है। परीक्षा में denominator shrink होने पर density increase का inverse relation समझें। / Cultivated land is \(0.20A\). Therefore, density relative to cultivated land is \(250/0.20=1250\) persons per square kilometre of cultivated land. The third option is correct. This is five times the arithmetic density because productive land is only one-fifth of total area. In examinations, understand the inverse relationship between denominator size and density.

Open Question Page
Ask Friends

यदि किसी region में cultivated-land density arithmetic density की 5 गुना है, तो cultivated land total area का कितना प्रतिशत है?

If density relative to cultivated land is five times the arithmetic density, what percentage of total area is cultivated?

Explanation opens after your attempt
Correct Answer

B. 20 प्रतिशत20 percent

Explanation

Simple Explanation

यदि \(P/C=5(P/A)\), तो \(A/C=5\), इसलिए \(C=A/5\)। Cultivated land total area का 20 percent है। दूसरा विकल्प सही है। यह density measures के denominator relationship का direct application है। परीक्षा में same numerator population होने पर density ratio area ratio के inverse के बराबर होता है। / If \(P/C=5(P/A)\), then \(A/C=5\), so \(C=A/5\). Cultivated land is therefore 20 percent of total area. The second option is correct. This is a direct application of the denominator relationship between density measures. With the same population numerator, density ratio is the inverse of area ratio.

Open Question Page
Ask Friends

यदि किसी city की gross density 450 और net residential density 1125 व्यक्ति प्रति वर्ग किलोमीटर है, तो residential land total area का कितना प्रतिशत है?

If a city's gross density is 450 and net residential density is 1125 persons per square kilometre, what percentage of total area is residential land?

Explanation opens after your attempt
Correct Answer

B. 40 प्रतिशत40 percent

Explanation

Simple Explanation

Gross density \(P/A=450\) और net residential density \(P/R=1125\) है। इसलिए \(R/A=450/1125=0.4\)। Residential land total area का 40 percent है। दूसरा विकल्प सही है। Net density अधिक है क्योंकि denominator smaller residential area है। / Gross density is \(P/A=450\), while net residential density is \(P/R=1125\). Therefore, \(R/A=450/1125=0.4\). Residential land is 40 percent of total area, making the second option correct. Net density is higher because its denominator is the smaller residential area.

Open Question Page
Ask Friends

यदि किसी city की gross density 600 और land-only density 750 व्यक्ति प्रति वर्ग किलोमीटर है, तो water bodies total area का कितना प्रतिशत हैं?

If a city's gross density is 600 and its land-only density is 750 persons per square kilometre, what percentage of total area consists of water bodies?

Explanation opens after your attempt
Correct Answer

B. 20 प्रतिशत20 percent

Explanation

Simple Explanation

Gross density \(P/A=600\) और land density \(P/L=750\) है। इसलिए \(L/A=600/750=0.8\)। Land total area का 80 percent है, इसलिए water bodies 20 percent हैं। दूसरा विकल्प सही है। यह example दिखाता है कि density values से boundary composition infer की जा सकती है। / Gross density is \(P/A=600\), while land-only density is \(P/L=750\). Therefore, \(L/A=600/750=0.8\). Land occupies 80 percent of total area, so water bodies occupy 20 percent. The second option is correct. This example shows how density values can be used to infer boundary composition.

Open Question Page
Ask Friends

यदि किसी region की arithmetic density 210 और habitable-area density 525 व्यक्ति प्रति वर्ग किलोमीटर है, तो habitable area total area का कितना प्रतिशत है?

If a region's arithmetic density is 210 and habitable-area density is 525 persons per square kilometre, what percentage of total area is habitable?

Explanation opens after your attempt
Correct Answer

B. 40 प्रतिशत40 percent

Explanation

Simple Explanation

Arithmetic density \(P/A=210\) और habitable density \(P/H=525\) है। इसलिए \(H/A=210/525=0.4\)। Habitable area total area का 40 percent है। दूसरा विकल्प सही है। Remaining 60 percent area under the stated assumption settlement के लिए effectively unusable माना गया है। / Arithmetic density is \(P/A=210\), while habitable-area density is \(P/H=525\). Therefore, \(H/A=210/525=0.4\). Habitable area is 40 percent of total area, making the second option correct. Under the stated assumption, the remaining 60 percent is effectively unusable for settlement.

Open Question Page
Ask Friends

यदि किसी region की official density 360 है और total area का 10 प्रतिशत inland water है, तो land-only density कितनी होगी?

If a region's official density is 360 and 10 percent of total area is inland water, what is the land-only density?

Explanation opens after your attempt
Correct Answer

B. 400 व्यक्ति प्रति वर्ग किलोमीटर400 persons per square kilometre

Explanation

Simple Explanation

Land area total area का 90 percent है। Gross density \(360=P/A\) है। इसलिए land-only density \(P/(0.9A)=360/0.9=400\) व्यक्ति प्रति वर्ग किलोमीटर होगी। दूसरा विकल्प सही है। Water area remove करने से denominator छोटा हो जाता है, इसलिए density बढ़ती है। / Land area is 90 percent of total area. Gross density is \(360=P/A\). Therefore, land-only density is \(P/(0.9A)=360/0.9=400\) persons per square kilometre. The second option is correct. Removing water from the denominator reduces the area and therefore increases density.

Open Question Page
Ask Friends

यदि दो cities की official density compare की जा रही हो और एक city का boundary compact urban core जबकि दूसरी का boundary large rural fringe शामिल करता हो, तो कौन-सा conclusion सबसे उचित है?

If official densities of two cities are compared and one boundary covers a compact urban core while the other includes a large rural fringe, which conclusion is most appropriate?

Explanation opens after your attempt
Correct Answer

B. Boundary differences direct density comparison को distort कर सकती हैंBoundary differences can distort direct density comparison

Explanation

Simple Explanation

Arithmetic density denominator में official area use करती है। Compact urban-core boundary smaller area पर population concentrate दिखा सकती है, जबकि rural fringe included होने से average density dilute हो सकती है। इसलिए direct comparison misleading हो सकता है और दूसरा विकल्प सही है। परीक्षा में density comparison से पहले spatial boundary definitions comparable हैं या नहीं, यह check करना जरूरी है। / Arithmetic density uses official area in the denominator. A compact urban-core boundary can show population concentrated over a smaller area, while including a large rural fringe can dilute average density. Direct comparison may therefore be misleading, making the second option correct. Before comparing city densities, check whether the spatial boundary definitions are comparable.

Open Question Page
Ask Friends

यदि किसी region की density time series में अचानक बढ़ती है लेकिन census population लगभग unchanged है, तो सबसे पहले क्या जांचना चाहिए?

If a region's density suddenly rises in a time series while census population remains nearly unchanged, what should be checked first?

Explanation opens after your attempt
Correct Answer

A. क्या administrative area घटा या boundary redefine हुईWhether administrative area decreased or the boundary was redefined

Explanation

Simple Explanation

Population लगभग unchanged होने पर sudden density increase mathematically denominator area reduction की ओर संकेत करता है। इसलिए boundary contraction, land-area revision या area-definition change पहला logical check है। Rainfall calculation को directly नहीं बदलती और standard density formula भी same रहता है। इसलिए पहला विकल्प सही है। Time-series comparison में spatial consistency बहुत महत्वपूर्ण है। / With population nearly unchanged, a sudden rise in density mathematically points toward a reduction in the area denominator. Therefore, boundary contraction, land-area revision, or a change in area definition should be checked first. Rainfall does not directly alter the calculation and the standard density formula remains the same. The first option is correct. Spatial consistency is crucial in time-series comparisons.

Open Question Page
Ask Friends

Population Density के expert-level प्रश्नों के लिए सबसे उपयुक्त analytical framework कौन-सा है?

Which analytical framework is most appropriate for expert-level questions on Population Density?

Explanation opens after your attempt
Correct Answer

C. population-area ratio के साथ percentage multipliers, boundary definitions, effective area, gross-net density, spatial concentration और comparability को integrate करनाIntegrating percentage multipliers, boundary definitions, effective area, gross-net density, spatial concentration, and comparability with the population-area ratio

Explanation

Simple Explanation

Expert-level analysis में basic formula \(Population/Area\) केवल प्रारंभिक बिंदु है। सही reasoning के लिए proportional changes, inverse percentages, administrative boundaries, land versus total area, habitable or cultivated area, gross versus net density, internal concentration और time-series comparability भी समझनी पड़ती है। इसलिए तीसरा विकल्प सही है। बाकी approaches density को oversimplify करती हैं और गलत interpretation दे सकती हैं। / At expert level, the basic formula \(Population/Area\) is only the starting point. Correct reasoning also requires proportional changes, inverse percentages, administrative boundaries, land versus total area, habitable or cultivated area, gross versus net density, internal concentration, and time-series comparability. Therefore, the third option is correct. The other approaches oversimplify density and can lead to incorrect interpretations.

Open Question Page
Ask Friends
FAQs

Class 12 Geography Quiz FAQs

How many questions are in this quiz?

This level is designed for 50 active questions. Currently 50 questions are available for the selected class and difficulty.

Is there a timer in this quiz?

Yes, the timer uses 25 seconds per question for Expert difficulty and shows the total remaining time on the page.

Can I open each question separately?

Yes, every question has its own SEO-friendly page with answer, explanation and related practice links.