In _________ years World Population increased from 6 billion to 7 billion.
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → 12
World population reached 6 billion in 1999 and 7 billion in 2011: 2011 − 1999 = 12 years.
Note: This question is taken from the pre-rationalised NCERT book. The latest edition (2026-27) does not have this part. An extract of the pre-rationalised NCERT book is given below for the benefit of students.
Pre-rationalised NCERT:
Fig. 2.2: Resource, Technology and Population Growth |
