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If the population growth rate is twenty percent and the previous population was seventy lakh, what will be the absolute increase?

Answer and explanation

Correct answer: Fourteen lakh

The correct answer is B: fourteen lakh. An absolute increase is the actual number added to the population, not the percentage itself. Convert 20% to 20/100 and multiply it by the previous population: (20/100) × 70 lakh = 0.2 × 70 lakh = 14 lakh. Thus the population would rise by fourteen lakh; the resulting population would be 84 lakh, although only the increase is asked for. Option A is half of the correct value and may come from an incorrect mental calculation. Option C repeats the rate as a number instead of applying it to the base. Option D is the entire previous population, not its 20% increase. Memory cue: absolute increase = growth rate × original population.

Related tags

Absolute IncreaseGrowth RatePercentage CalculationPopulationPopulation GrowthGeographyClass 9 Mcq

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