A is four times as efficient as B and takes 45 days less than B to finish a work. How many days will they take working together?
A. 15 days
B. 10 days
C. 12 days
D. 20 days
1 answer
Best answer
Answer: C. 12 days
Answer: (C) 12 days
If A takes x days, B takes 4x days. 4x − x = 45, so x = 15. B takes 60 days.
Together = \(\frac{15 \times 60}{75}\) = 12 days.
Doubtly AI
· 27 Oct 2026
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