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If previous population is thirty lakh and current population is thirty six lakh, what is the growth percentage?

Answer and explanation

Correct answer: Twenty percent

The direct answer is B: twenty percent. First find the increase: current population minus previous population equals 36 lakh minus 30 lakh, or 6 lakh. Next use the growth-percentage formula: growth percentage = increase divided by previous population, multiplied by 100. Thus, 6 divided by 30 times 100 equals 20%. The unit lakh cancels because both numbers use the same unit. A is wrong because 10% of 30 lakh is 3 lakh, not 6 lakh. B is correct because 6 lakh is one-fifth of 30 lakh, and one-fifth equals 20%. C is wrong because 30% of 30 lakh would be 9 lakh. D is wrong because the increase is 6 lakh, but 6 is not the percentage. Memory cue: subtract first, divide by the old value, then multiply by 100.

Related tags

Growth PercentageAbsolute GrowthPopulation CalculationPrevious PopulationPopulation GrowthPopulationGeographyClass 9 Mcq

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