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If the previous population was forty lakh and the current population is forty-eight lakh, what is the growth percentage?

Answer and explanation

Correct answer: Twenty percent

Direct answer: Option B, twenty percent, is correct. Growth percentage compares the increase with the previous or initial population. First find the increase: current population − previous population = 48 lakh − 40 lakh = 8 lakh. Next divide the increase by the previous population: 8 ÷ 40 = 0.2. Finally multiply by 100: 0.2 × 100 = 20%. The lakh units cancel because both populations use the same unit. Option A, 10%, is too small and does not come from the correct calculation. Option B is correct because 8 lakh is one-fifth of 40 lakh, and one-fifth equals 20%. Option C, 8%, confuses the numerical increase of 8 lakh with the percentage increase. Option D, 40%, incorrectly uses the old population as the percentage. Memory cue: growth percentage = (increase ÷ original population) × 100.

Related tags

Growth PercentagePopulation CalculationPercentage FormulaPopulation GrowthPopulationGeographyClass 9 Mcq

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