Q. A and B together do a work in 12 days. A alone can do it in 20 days. In how many days can B alone do it?
✅ Correct Answer: (C)
30 days
Explanation: Together = 1/12, A = 1/20 → B = 1/12 - 1/20 = 1/30.
Explanation by: Yami Thakur
Together = 1/12, A = 1/20 → B = 1/12 - 1/20 = 1/30.