Q. A does 1/4 of a job in 9 days while B does 1/5 of the job in 10 days. Working together, how long will they take?
✅ Correct Answer: (C)
10 days
Explanation: A = 1/36, B = 1/50 → together = 43/1800. Time = 1800/43 ≈ 10 days.
Explanation by: Ankit Singh
A = 1/36, B = 1/50 → together = 43/1800. Time = 1800/43 ≈ 10 days.