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Demography & Family Welfare

Question
14 out of 27
 

If annual growth rate of a population is 1.5 – 2%, what number of years will be required to double the population? (AIPG 2011)



A 70 – 47 yrs
B 47 – 35 yrs

C 35 – 28 yrs
D 28 – 23 yrs

Ans. B 47 – 35 yrs

When the crude death rate is subtracted from the crude birth rate, the net residual is current annual growth rate.

Relation between growth rate and population:

Rating

Annual rate of growth %

Number of years required for the population to double in size.

Stationary population

No growth

-

Slow growth

< 0.5

> 139

Moderate growth

0.5 to 1

139-70

Rapid growth

1 to 1.5

70-47

Very rapid growth

1.5 to 2

47-35

Explosive growth

2 to 2.5

35-28

Explosive growth

2.5 to 3

28-23

Explosive growth

3 to 3.5

23-20

Explosive growth

3.5 to 4

20-18

Demography & Family Welfare Flashcard List

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