Q. A and B can do a job in 10 days and 15 days respectively. Working alternately starting with A, they finish in?
✅ Correct Answer: (B)
9 days
Explanation: A per day = 1/10, B per day = 1/15 → 2 days work = 1/10 + 1/15 = 1/6. In 6 days = full. Extra 3 days = 9 total approx.
Explanation by: Ankit Singh
A per day = 1/10, B per day = 1/15 → 2 days work = 1/10 + 1/15 = 1/6. In 6 days = full. Extra 3 days = 9 total approx.