SSC IB Security Assistant & MTS Mock Test Series 2023 Quantitative Aptitude Time and Work Pipe and Cistern
One pipe can fill a pool in 40 minutes and another pipe can empty a pool in 60 minutes. If both the pipes are opened together, then in how many hours will the empty pool be filled?
1
2 hours
2
4.5 hours
3
4 hours
4
5.5 hours