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If an area has population of eighteen lakh and area of two thousand four hundred square kilometres, what will be its population density?

Answer and explanation

Correct answer: Seven hundred fifty persons per square kilometre

Direct answer: Option B, 750 persons per square kilometre. Population density means the number of people living in one square kilometre. Use the formula: density = population ÷ area. Eighteen lakh means 1,800,000 people. Now calculate 1,800,000 ÷ 2,400. Since 2,400 × 750 = 1,800,000, the density is 750 persons per square kilometre. Option A would result from an incorrect division and is too low. Option C is incorrect because 2,400 × 900 equals 2,160,000, not 1,800,000. Option D is also incorrect because 2,400 × 1,200 equals 2,880,000. Always retain the unit: persons per square kilometre. A helpful check is to multiply the proposed answer by the area; the product must equal the population.

Related tags

Density CalculationEighteen LakhAreaPopulation DensityPopulationGeographyClass 9 Mcq

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