It took a million years to reach one billion people. How long did it take to go from 5 to 6 billion?
A12 years
B100 years
C50 years
D25 years
Answer & Solution
Correct answer: A. 12 years
1. Doubling time keeps shrinking.
2. Five to six billion took only 12 years.
3. Developed countries take longer to double.
_Source: NCERT Class 12 Geography, Fundamentals of Human Geography, Chapter 2, The World Population._
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