defence exam BSF Constable (Tradesmen) 2023 Mock Test Quantitative Aptitude Time and Work Pipe and Cistern
A tank is connected to 4 taps among which two are inlet taps and two are outlet taps. Inlet taps can fill the tank in 10 and 15 minutes when tank is empty, while outlet pipes can empty the full tank in 12 and 20 minutes. In how many minutes an empty tank can be filled when all the taps are opened simultaneously?
1
24 minutes
2
25 minutes
3
30 minutes
4
36 minutes