state gov DSSSB Junior Assistant, Steno and LDC Mock Test 2023 - 24 Quantitative Aptitude Time and Work Pipe and Cistern
Two pipes X and Y can fill a pool with water in 30 minutes and 45 minutes respectively. The pipe Z can empty the pool in 36 minutes. First X and Y are opened, and after 12 minutes Z is opened. Find the total time in which the pool will be filled?
1
30
2
12
3
36
4
24