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If an area's population increases from 150 lakh to 165 lakh, what is the percentage growth?

Answer and explanation

Correct answer: 10 percent

Direct answer: B, 10 percent, is correct. First find the absolute increase: 165 lakh − 150 lakh = 15 lakh. Percentage growth is calculated by dividing the increase by the original population and multiplying by 100: (15 ÷ 150) × 100 = 0.1 × 100 = 10 percent. The original population must be used as the denominator, not the final population. A is wrong because 15 lakh is the absolute increase, not the percentage; 5 percent of 150 lakh would be only 7.5 lakh. C is wrong because it confuses the increase of 15 lakh with 15 percent. D is wrong because 20 percent of 150 lakh would be 30 lakh, which is not the increase. Memory cue: percentage growth = (new value − old value) ÷ old value × 100.

Related tags

Percentage GrowthPopulation CalculationPercentage FormulaPopulation GrowthPopulationGeographyClass 9 Mcq

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