SSC NTA Delhi University Non-Teaching 2021 Mock Test Quantitative Aptitude Time and Work Pipe and Cistern
Two empty pipes are connected to a water tank. The 1st pipe alone empties the tank in 12 minutes and 2nd pipe alone empties the tank in 20 minutes. If water leaks out at a constant rate, how many minutes will it take, if both the pipe together empty the tank?
1
6.5 min
2
7.5 min
3
8 min
4
15 min