defence exam BSF Constable (Tradesmen) 2023 Mock Test Quantitative Aptitude Time and Work Pipe and Cistern
Pipe A can fill a tank in 40 minutes and Pipe B can empty the same tank in 120 minutes. Find the total time taken by A and B together to fill the tank.
1
150 minutes
2
120 minutes
3
60 minutes
4
80 minutes