railway RRB NTPC Mock Test Series 2024-25 (CBT 1 + CBT 2) Quantitative Aptitude Time and Work Pipe and Cistern
A vessel can be filled by a tap A in 8 minutes, and by another tap B in 10 minutes. A third tap C can empty the vessel in 4 minutes. If all taps are opened simultaneously when the vessel is half full, then which of the following is true?
1
The vessel will be filled in 20 minutes.
2
The vessel will be filled in 40 minutes.
3
The vessel will be emptied in 40 minutes.
4
The vessel will be emptied in 20 minutes.