railway RRB NTPC Mock Test Series 2024-25 (CBT 1 + CBT 2) Quantitative Aptitude Time and Work Pipe and Cistern
An electric pump can fill a tank in 5 hours. Due to a leakage in the tank, it takes 7\(\frac{1}{2}\) hours to fill the tank. How much time will this leak take to empty the full tank if water does not get in or out of the tank through any other point during this period?
1
30 hours
2
15 hours
3
20 hours
4
25 hours