Q. A does a work in 12 days, B does it in 15 days, C does it in 20 days. Together they do the work in?
✅ Correct Answer: (A)
4 days
Explanation: A+B+C = 1/12 + 1/15 + 1/20 = 1/4 → 4 days.
Explanation by: Ankit Singh
A+B+C = 1/12 + 1/15 + 1/20 = 1/4 → 4 days.