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If a country's growth rate remains consistently high, what effect will this have on doubling time?

Answer and explanation

Correct answer: Doubling time will generally be shorter

Doubling time is the period required for a population to become twice its present size. If the growth rate is high and remains steady, population is added more rapidly each year. Consequently, it reaches twice its starting size in less time than it would at a lower rate.

The Rule of 70 gives the approximate relationship: doubling time \(\approx70\div\) annual growth rate. Since the rate is in the denominator, a higher rate generally produces a shorter doubling time. Therefore option A is correct. This conclusion assumes that the rate remains consistently high and that other conditions do not substantially change. The other choices either reverse this relationship or deny the possibility of doubling.

Related tags

Doubling TimeHigh Growth RateRule Of 70Population DoublingPopulation GrowthThe World Population – DistributionDensity And GrowthThe World Population Distribution Density And Growth

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