Mathematics
NULL
Medium
Question
A city's population grows 5% a year. If it was 138,915 in 1981, what was it in 1978?
A
1,20,000
✓ Official correct answer
B
1,10,000
C
1,00,000
D
90000
Community credibility
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A
1,20,000
No member explanations yet for this option.
B
1,10,000
No member explanations yet for this option.
C
1,00,000
No member explanations yet for this option.
D
90000
No member explanations yet for this option.
Explanation
138,915 / (1.05)³ = 1,20,000.