Q. A and B can complete a work in 9 days and 12 days respectively. Working together, how long will they take?
✅ Correct Answer: (B)
5 days
Explanation: 1 day’s work = 1/9 + 1/12 = 7/36. Time = 36/7 ≈ 5 days.
Explanation by: Yami Thakur
1 day’s work = 1/9 + 1/12 = 7/36. Time = 36/7 ≈ 5 days.