Q. A and B together complete a work in 12 days. If A alone can complete it in 20 days, then B alone can complete it in:
✅ Correct Answer: (B)
30 days
Explanation: B's work/day = 1/12 − 1/20 = 1/30. Hence B takes 30 days.
Explanation by: Deepak Sahoo
B's work/day = 1/12 − 1/20 = 1/30. Hence B takes 30 days.