engineering recuitment PGCIL Diploma Trainee Mock Test 2024 Quantitative Aptitude Time and Work Pipe and Cistern
Two pipes can fill a tank in 20 hours and 60 hours respectively. A third pipe is an outlet pipe. If all three are opened together, the tank gets filled up in 40 hours. What time will the outlet pipe take to empty the full tank?
1
30 hours
2
28 hours
3
20 hours
4
24 hours