SSC NTA Delhi University Non-Teaching 2021 Mock Test Quantitative Aptitude Time and Work Pipe and Cistern
Pipe A and Pipe B can fill a tank in 3 and 5 hours respectively. While pipe C can empty a tank in 12 hours. If all pipes are opened together then after 2 hours what portion of the tank will be filled?
1
(9/10)th
2
(2/5)th
3
(1/7)th
4
(6/7)th