A is 25% more efficient than B. If B takes 20 days to do a work, how many days will A take?
A. 16 days
B. 15 days
C. 25 days
D. 18 days
1 answer
Best answer
Answer: A. 16 days
Answer: (A) 16 days
Time is inversely proportional to efficiency. A's time = 20 ÷ 1.25 = 16 days.
Trap: 25% less time (15 days) is wrong; 25% more efficiency means 20% less time.
Doubtly AI
· 27 Oct 2026
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