एक region की density 400 व्यक्ति प्रति वर्ग किलोमीटर है। यदि population unchanged रहते हुए area half हो जाए, तो new density क्या होगी?
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D. 800 व्यक्ति प्रति वर्ग किलोमीटर800 persons per square kilometre
Simple Explanation
Population constant और area half होने पर density double हो जाती है। Original density 400 है, इसलिए new density \(400 \times 2 = 800\) persons per square kilometre होगी। चौथा विकल्प सही है। यह inverse relationship का direct application है। परीक्षा में fixed population के साथ area half होने को density double होने से जोड़ें। / With population constant, halving area doubles density. The original density is 400, so the new density becomes \(400 \times 2 = 800\) persons per square kilometre. Therefore, the fourth option is correct. This is a direct application of the inverse relationship between area and density. In examinations, with fixed population, connect halving the area with doubling the density.
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