Q. A pipe can fill a tank in 25 hours. Another pipe empties it in 50 hours. If both are opened together, how long will it take to fill the tank?
✅ Correct Answer: (C)
50 hours
Explanation: Net rate = 1/25 − 1/50 = 1/50.
Explanation by: Kanak Sharma
Net rate = 1/25 − 1/50 = 1/50.