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If the 30-49 age group is very broad in a country's age pyramid and the base is rapidly narrowing, which change is most likely after 20 years?

Answer and explanation

Correct answer: The elderly share may rise rapidly

An age pyramid shows the size of different age cohorts. A very broad 30–49 group represents a large generation. About 20 years later, much of this group will be around 50–69 years old, so it will move closer to or into the elderly category. At the same time, a rapidly narrowing base indicates that younger cohorts are smaller.

As the large cohort ages and fewer young people follow it, the elderly share of the total population is likely to rise. Therefore, option A is the most likely outcome. The base will not automatically widen, because that depends on future births. The child group need not become the largest, and the working-age population cannot be assumed to remain unchanged; migration, mortality and fertility can also affect it.

Related tags

Cohort AgeingAge PyramidPopulation AgeingFuture Age StructureAge StructurePopulation CompositionGeographyClass 12 Mcq

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