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If an area has population of forty-eight lakh and area of eight thousand square kilometres, what will be the density?

Answer and explanation

Correct answer: Six hundred persons per square kilometre

Correct answer: B, six hundred persons per square kilometre. Population density is calculated by dividing total population by total area: density = population ÷ area. Forty-eight lakh means 4,800,000 people. Now divide 4,800,000 by 8,000. Cancelling three zeros gives 4,800 ÷ 8 = 600. Therefore, the density is 600 persons per square kilometre. A is wrong because 400 would result from an incorrect division. C is wrong because it overestimates the quotient; 8,000 multiplied by 800 would equal 6,400,000, not 4,800,000. D is also too high; 8,000 multiplied by 1,200 would equal 9,600,000. Always include the unit because density is not just a number. Memory cue: population on top, area below: people ÷ square kilometres.

Related tags

Density CalculationPopulation AreaPersons Per Square KilometrePopulation DensityPopulationGeographyClass 9 Mcq

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