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If an area has a population of six lakh and area of fifteen hundred square kilometres, what will be the density?

Answer and explanation

Correct answer: Four hundred persons per square kilometre

The direct answer is A: four hundred persons per square kilometre. Convert six lakh to 600,000 and fifteen hundred to 1,500. Apply density = population ÷ area: 600,000 ÷ 1,500 = 400. A quick check is 1,500 × 400 = 600,000, so the calculation is verified. Option A is correct and has the correct unit. Option B, 600, would give 900,000 people in that area, so it is too high. Option C, 1,500, would give 2,250,000 people, also much too high. Option D, 200, would give only 300,000 people, so it is too low. Do not divide 1,500 by 600,000, and do not forget that one lakh equals 100,000.

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Density CalculationLakhArea

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