A can finish a piece of work in 12 days and B can finish it in 18 days. In how many days will they finish it working together?
A. 7 days
B. \(7\frac{1}{2}\) days
C. \(7\frac{1}{5}\) days
D. 15 days
1 answer
Best answer
Answer: C. \(7\frac{1}{5}\) days
Answer: (C) \(7\frac{1}{5}\) days
Work per day \(= \frac{1}{12} + \frac{1}{18} = \frac{3 + 2}{36} = \frac{5}{36}\).
Time \(= \frac{36}{5} = 7\frac{1}{5}\) days.
Doubtly AI
· 27 Oct 2026
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