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Decadal population growth refers to growth over which period?

Answer and explanation

Correct answer: Ten years

The direct answer is B: decadal population growth refers to growth over ten years. A decade is a period of ten years, and “decadal” means related to one decade. To understand the term step by step, first identify the unit: one decade = ten years. Then identify the measurement: decadal growth measures the change in population during that ten-year interval, often between two census dates. The change may be stated as an actual number or a percentage, but the time span remains ten years. Option A, five years, is half a decade. Option B, ten years, is correct. Option C, fifteen years, is longer than one decade. Option D, twenty years, represents two decades, not one. The word “deca” is a useful clue because it is associated with ten. Memory cue: decade and दशकीय both point to ten years.

Related tags

Decadal GrowthTen-Year PeriodPopulation GrowthDemographyPopulationGeographyClass 9 Mcq

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