यदि किसी region की population और density दोनों 20 प्रतिशत घटें, तो area में क्या परिवर्तन होगा?
If both population and density of a region decrease by 20 percent, what happens to area?
Explanation opens after your attempt
B. Area unchanged रहेगाArea will remain unchanged
Simple Explanation
क्योंकि \(Area = Population/Density\), new area multiplier \(\frac{0.8}{0.8}=1\) है। इसलिए area unchanged रहता है और दूसरा विकल्प सही है। Population decline और density decline समान proportion में होने से ratio same रहता है। परीक्षा में population और density के same percentage change को area stability से जोड़ना useful है। / Since \(Area = Population/Density\), the new area multiplier is \(\frac{0.8}{0.8}=1\). Therefore, area remains unchanged and the second option is correct. Population and density decline by the same proportion, leaving their ratio unchanged. In examinations, equal proportional changes in population and density can be linked with stable area.
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