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If population increases from 120 lakh to 150 lakh, what are the absolute increase and percentage growth?

Answer and explanation

Correct answer: 30 lakh and 25 percent

Direct answer: A, 30 lakh and 25 percent. First find the absolute increase by subtracting the initial population from the final population: 150 lakh − 120 lakh = 30 lakh. Next calculate percentage growth using the initial population as the base: (absolute increase ÷ initial population) × 100 = (30 ÷ 120) × 100 = 25%. The final population itself is not the increase, so C is wrong. B uses an incorrect percentage, and D adds the populations instead of finding their difference and also gives a wrong rate. Always use the starting value in the denominator when calculating growth from an initial population. Memory cue: difference first, then difference divided by the beginning value.

Related tags

Absolute IncreasePercentage GrowthPopulation CalculationPopulation GrowthPopulationGeographyClass 9 Mcq

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