SSC NTA Delhi University Non-Teaching 2021 Mock Test Quantitative Aptitude Time and Work Pipe and Cistern
Three pipes P, Q and R can fill a tank in 12 hours, 15 hours and 20 hours respectively. If P and R start the work and works for 4 hours, then the rest of the work is completed by Q in what time?
1
8 hours
2
7 hours
3
6 hours
4
5 hours