Simple Explanation
Density constant रखने के लिए population-to-area ratio unchanged रहना चाहिए। Area 40 percent बढ़कर \(1.4A\) हो जाए तो population भी \(1.4P\) यानी 40 percent बढ़नी चाहिए। इसलिए तीसरा विकल्प सही है। यदि population unchanged रहती तो density घट जाती। परीक्षा में constant density के लिए population और area के proportional movement को याद रखें। / To keep density constant, the population-to-area ratio must remain unchanged. If area rises by 40 percent to \(1.4A\), population must also rise to \(1.4P\), an increase of 40 percent. Therefore, the third option is correct. If population remained unchanged, density would fall. In examinations, remember that constant density requires proportional changes in population and area.
