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If the Rule of 70 suggests a doubling time of 28 years but the growth rate gradually declines, what may the actual doubling time be?

Answer and explanation

Correct answer: More than 28 years

The correct answer is C: more than 28 years. The Rule of 70 estimates doubling time as 70 divided by the annual percentage growth rate, assuming that rate stays roughly constant. If the rate declines, population growth slows compared with that assumption, so doubling takes longer than 28 years.

Related tags

Rule Of 70Doubling TimePopulation GrowthThe World Population – DistributionDensity And GrowthThe World Population Distribution Density And GrowthGeographyClass 12 Mcq

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