SSC CGL – Combined Graduate Level Examination · Question 70

Three pumps, A, B, and C are capable of filling a reservoir. A fills in 5 hours, B in 7 hours, and C in 10 hours. When all three pumps are opened together, they operate for 1.5 hours before pump C is closed. How much additional time will it take to completely fill the reservoir after that?

1. A1/2 hours
2. B43/25 hours
3. C47/48 hours
4. D45/41 hours