state gov DSSSB Junior Assistant, Steno and LDC Mock Test 2023 - 24 Quantitative Aptitude Time and Work Pipe and Cistern
Pipes A and B can fill a tank in 30 minutes and \(37\frac{1}{2}\)minutes, respectively. C is an outlet pipe. When all the three pipes are opened together, then the tank is full in 25 minutes. In how much time (in minutes) can C alone empty \(\frac{2}{5}th\) part of the tank?
1
24 minutes
2
30 minutes
3
20 minutes
4
25 minutes