railway RRB NTPC Mock Test Series 2024-25 (CBT 1 + CBT 2) Quantitative Aptitude Time and Work Pipe and Cistern
A pipe can fill a tank in 18 hours. Due to a leak in the bottom, It is filled in 42 hours. If the tank is full, How much time will the leak take to empty it?
1
32 hr
2
30.5 hr
3
28.5 hr
4
31.5 hr