A and B together can do a work in 8 days. A alone can do it in 12 days. How many days will B alone take?
A. 24 days
B. 4 days
C. 16 days
D. 20 days
1 answer
Best answer
Answer: A. 24 days
Answer: (A) 24 days
Shortcut: B = \(\frac{8 \times 12}{12 - 8} = \frac{96}{4} = 24\) days.
LCM: work = 24 units; A+B = 3/day, A = 2/day, so B = 1/day → 24 days.
Doubtly AI
· 27 Oct 2026
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