railway RRB NTPC Mock Test Series 2024-25 (CBT 1 + CBT 2) Quantitative Aptitude Time and Work Pipe and Cistern
Two pipes A and B can fill a tank in 144 minutes and 180 minutes respectively; both pipes are opened together, but after 48 minutes, pipe A is closed. In how many minutes, B alone fill the remaining part of the tank?
1
144 minutes
2
84 minutes
3
72 minutes
4
180 minutes