defence exam AOC Material Assistant 2022 Mock Test Quantitative Aptitude Time and Work Pipe and Cistern
Two pipes A and B are filling pipe and C is emptying pipe. A and C can fill the tank in 10 hours, B and C can fill the tank in 15 hours and C can empty the full tank in 30 hours . If all the pipes are opened together, what is the time required to fill the double-capacity tank?
1
10 hours
2
20 hours
3
15 hours
4
None