state gov UP Police Constable Mock Test Series 2025 Quantitative Aptitude Time and Work Pipe and Cistern
A pipe can fill a tank in 4 hours and a leak at the bottom can empty that full tank in 6 hours. If after the tank is \(\frac{1}{3}\) full, the leak is completely closed, how much time from beginning will it take for the tank to get filled completely?
1
12 hours
2
4 hours
3
9 hours
4
\(\frac{{20}}{3}\) hours