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If an area's previous population was one hundred twenty lakh and its increase was twenty-four lakh, what was the growth percentage?

Answer and explanation

Correct answer: Twenty percent

The direct answer is B: twenty percent. Growth percentage compares the increase with the previous population, not with the final population. First identify the values: previous population = 120 lakh and increase = 24 lakh. Use the formula: growth percentage = (increase ÷ previous population) × 100. Substitution gives (24 ÷ 120) × 100 = 0.2 × 100 = 20%. The lakh units cancel because both quantities use the same unit. Option A, 10%, is too small and does not represent 24 out of 120. Option B is correct because 24 is one-fifth of 120, and one-fifth equals 20%. Option C confuses the absolute increase, 24 lakh, with a percentage. Option D uses an incorrect ratio. Memory cue: for growth percentage, the earlier population is the denominator.

Related tags

Growth PercentagePopulation CalculationRatioPopulation GrowthPopulationGeographyClass 9 Mcq

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