percentage density MCQ Questions for Class 12

Simple Explanation

Original density \(P/A\) मानें। New density \(\frac{1.5P}{1.25A} = 1.2\frac{P}{A}\) होती है, इसलिए density 20 percent बढ़ती है। प्रश्न केवल direction पूछता है, इसलिए तीसरा विकल्प सही है। Population growth area growth से तेज होने के कारण persons per unit area बढ़ते हैं। परीक्षा में percentage changes compare करके भी density की direction जल्दी पहचानी जा सकती है। / Let the original density be \(P/A\). The new density is \(\frac{1.5P}{1.25A} = 1.2\frac{P}{A}\), so density increases by 20 percent. Since the question asks only for the direction of change, the third option is correct. Population is growing faster than area, so the number of people per unit area rises. In examinations, comparing percentage changes in population and area can quickly reveal the direction of density change.