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If an area's current population is one crore twenty lakh and its previous population was one crore, what is the growth percentage?

Answer and explanation

Correct answer: Twenty percent

The correct answer is C: twenty percent. First find the absolute increase: 1 crore 20 lakh − 1 crore = 20 lakh. Next compare this increase with the previous population, which was 1 crore. One crore equals 100 lakh, so the percentage is (20 lakh ÷ 100 lakh) × 100 = 20%. Option C is correct. Option A would represent an increase of only 10 lakh on a base of 1 crore. Option B incorrectly treats 20 lakh as 12% of 1 crore; 12% would be 12 lakh. Option D would require an increase of 40 lakh. The important step is to use the previous population as the base and convert units consistently. Memory cue: one crore is 100 lakh, so 20 lakh out of one crore is 20 out of 100, or 20%.

Related tags

Growth PercentageCrore And LakhPopulation CalculationPopulation GrowthPopulationGeographyClass 9 Mcq

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