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If an area has a growth rate of 1.5 percent and base population is 80 lakh what will be the absolute increase?

Answer and explanation

Correct answer: 1.2 lakh

Direct answer: A, 1.2 lakh. Absolute increase is found by applying the percentage rate to the base population. Convert 1.5 percent into a fraction: 1.5/100 = 0.015. The base population is 80 lakh, so absolute increase = 0.015 × 80 lakh = 1.2 lakh. The new population, if required, would be 80 + 1.2 = 81.2 lakh; the question asks only for the increase. Option A is correct. Option B, 12 lakh, comes from multiplying incorrectly by a much larger rate. Option C, 81.5 lakh, incorrectly treats the rate as 1.5 lakh added directly and also gives a total rather than the increase. Option D, 0.15 lakh, misses a factor of ten. Memory cue: percentage increase = rate divided by 100 multiplied by the original population.

Related tags

Growth RateAbsolute IncreasePercentage CalculationBase PopulationPopulation GrowthPopulationGeographyClass 9 Mcq

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