SSC NTA Delhi University Non-Teaching 2021 Mock Test Quantitative Aptitude Time and Work Pipe and Cistern
Two pipes P and Q can fill a tank in 6 and 12 min, respectively. Starting with pipe P, both the pipes are opened alternately each for 1 minute. In how much time will the tank be filled?
1
6 minutes
2
8 minutes
3
10 minutes
4
12 minutes