Population Density

Correct answer: A. When the state has high population but also very large area

A large area can reduce the density effect of high population. Exam tip: keep total number and number per area separate.

Correct answer: B. It will be higher

With same density a larger area gives higher total population. Exam tip: multiply density by area to get population.

Correct answer: C. 400 persons per square kilometre

(24000 \div 60 = 400) so the density will be 400 persons per square kilometre. Exam tip: simplify zeros before division.

Correct answer: D. It can hide differences between dense and sparse parts inside an area

Average density can hide internal regional differences. Exam tip: check local variation along with average.

Correct answer: A. Mistakenly treating a large area region as more dense

Population density means the number of people living per unit area, usually per square kilometre. Therefore, looking only at total population may wrongly make a large-area region appear more densely populated, even though its area may also be very large. Option B describes the correct method because area must be considered. Exam tip: compare density by dividing total population by area.

Correct answer: B. 15000

(750 \times 20 = 15000) so the population will be 15000. Exam tip: multiply density by area to find population.

Correct answer: C. 60 square kilometres

(18000 \div 300 = 60) so the area will be 60 square kilometres. Exam tip: divide population by density to find area.

Correct answer: D. It can expand the labour market, but it can also increase pressure on services

High population density can provide more workers, consumers and markets, which may support employment and economic activity. However, if housing, water, transport, health care and education are insufficient, pressure on these services increases. Therefore, option D presents both the benefit and the challenge in a balanced way. Options A and B are one-sided because of words such as “always”. Exam tip: in population questions, consider the effect on resources and public services.

Correct answer: A. When people live far apart and service distance is high

In sparse population distance can make service delivery costly and difficult. Exam tip: write challenges of low density too.

Correct answer: B. Density indicates pressure but resource condition must be examined separately

Population density tells us how many people occupy a given area, so it can suggest pressure on land and public services. However, it does not by itself show whether water, food, energy, housing, jobs, or other resources are sufficient. A high-density place may have strong infrastructure and good supplies, while a low-density place may still face scarcity because resources are limited or difficult to reach. Density must therefore be interpreted with other information.

Option B is correct because it separates the pressure indicated by density from the actual condition of resources. Option A is too absolute: density never fully describes resource quality. Option C is false because low density does not prevent a resource crisis. Option D is also false because high-density areas often need careful planning for services and resource use. Good policy examines both population patterns and resource availability.

Correct answer: C. The density of a local settlement can differ from the district's average density

A district’s average density is calculated using the total population and total area of the whole district. Therefore, a small urban settlement may be very densely populated while less densely populated parts of the district keep the district average at a medium level. Option B is incorrect because an average does not show the actual density of every local area. Exam tip: in density questions, always note the scale of the data—settlement, city, or district.

Correct answer: A. Because it explains density classes of colours or symbols

Without legend the correct meaning of colours is unclear. Exam tip: check the legend first while reading maps.

Correct answer: C. An inaccessible plateau where water and transport are both limited

Direct answer: Option C is correct. Low population density can result from both physical conditions and human conditions. Step by step, an inaccessible plateau may have difficult landforms and limited water; these are physical barriers. If roads and transport are also poor, people, goods, jobs and services cannot move easily; this is a human or infrastructure-related limitation. Together these conditions discourage settlement and produce low density. Option A is wrong because a metropolis usually attracts people through jobs and services, so it is more likely to be densely populated. Option B is wrong because fertile, well-connected plains generally support farming, transport and settlement. Option D is wrong because a trading port city usually offers trade, employment and transport. Memory cue: difficult land plus scarce water and poor roads usually means sparse population.

Correct answer: B. Area increases

If same population spreads over larger area people per square kilometre decrease. Exam tip: remember the inverse relation between area and density.

Correct answer: C. Area remains same and population increases

More population in the same area increases density. Exam tip: understand numerator and denominator of density.

Correct answer: B. Population doubled

If area is same and density doubles then population also doubles. Exam tip: note the condition of same area.

Correct answer: A. High density can increase chance of crowding but planning and housing quality also matter

High population density means many people live within a relatively small area. This can increase the possibility of crowding, traffic, pressure on housing, water, sanitation and other services. However, density by itself does not decide whether people will have a good or poor quality of life. Effective planning, sufficient housing, transport, public services, technology and building standards can allow a dense area to function well. The indicator must therefore be interpreted with other conditions.

Option A is correct because it gives a cautious and balanced relationship: high density may raise the chance of crowding, but planning and housing quality also matter. Option B is too absolute because high density does not always mean the worst life. Option C is also absolute and ignores problems that can occur in sparsely populated areas, such as isolation or weak services. Option D is false because density and settlement patterns are clearly related. Thus A is the most accurate choice.

Correct answer: A. Identifying areas that need greater water supply, housing and health services

Population density shows how many people live in a given area. Densely populated areas may face greater pressure on water supply, housing, schools, transport and health services, so governments use density data to prioritise resources and public facilities. Changing a river’s flow or determining a mountain’s height is not a use of population density. Exam tip: link population density with demand for public services and resource planning.

Correct answer: A. A border inaccessible area where security and connectivity are important

Density is not the only measure of administrative or strategic importance. Exam tip: remember the limit of density.

Correct answer: A. Due to concentration of services jobs and housing

Economic opportunities and services concentrate people in metropolises. Exam tip: connect local density with urbanisation.

Correct answer: A. As density rises checking resource and service capacity becomes more necessary

High density can pressure resource and service capacity. Exam tip: link density with carrying capacity.

Correct answer: D. 400 persons per square kilometre

(36000 \div 90 = 400) so the density is 400 persons per square kilometre. Exam tip: add the correct unit after calculation.

Correct answer: A. When resources are very limited such as a dry water scarce area

Direct answer: Option A is correct. Low population density only tells us that relatively few people live in each unit of area. It does not tell us that useful resources are plentiful. A dry region may have few people but also very little water, poor soil, scarce vegetation and limited services. When resources are divided among the people who need them, each person may still have low availability. Option A is correct because a water-scarce area can have low density and low resources per person. Option B suggests abundant water and land, so it points toward better availability, not low availability. Option C says services are nearby, which generally improves access. Option D says farming is very fertile, which suggests productive land. The key lesson is that population density and resource availability are separate ideas. Always examine both the number of people and the amount of usable resources.

Correct answer: C. It is an average and actual density may differ among states or districts

A national average does not fully show local variation. Exam tip: distinguish average and regional differences.

Correct answer: A. When one figure is in persons per square kilometre and the other is in persons per square mile

The correct situation is when one density is expressed per square kilometre and the other per square mile, because the area units differ. One square mile is about 2.59 square kilometres, so directly comparing the numbers without converting units can be misleading. This issue does not arise when both figures use the same unit. Exam tip: before comparing population densities, always check the unit after ‘per square’.