Q. Two inlet pipes can fill a tank in 6 and 8 hours respectively. An outlet pipe can empty it in 12 hours. How long will the tank take to fill if all pipes are opened?
✅ Correct Answer: (C)
6 hours
Explanation: Net rate = 1/6 + 1/8 − 1/12 = 1/6.
Explanation by: Kanak Sharma
Net rate = 1/6 + 1/8 − 1/12 = 1/6.