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 60 minutes and 80 minutes respectively, whereas the third pipe C can empty the full tank in 120 minutes. If all three pipes are opened together, in how many minutes the tank will be filled?
1
42
2
48
3
45
4
52