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 12 hours and 15 hours, respectively. Pipe C is an emptying pipe. Pipes A and B are opened together for 5 hours and then B is closed and C is opened. A and C together filled the remaining part of the tank in 10 hours. Pipe C alone can empty \(\frac{7}{15}\)th part of the tank in:
1
\(7 \frac{1}{2}\) hours
2
\(8 \frac{1}{2}\) hours
3
7 hours
4
8 hours