railway RRB NTPC Mock Test Series 2024-25 (CBT 1 + CBT 2) Quantitative Aptitude Time and Work Pipe and Cistern
Two pipes can fill an empty tub separately in 24 minutes and 40 minutes respectively and a third pipe can empty 30 gallons of water per minute. If all three pipes are open, the empty tub becomes full in one hour. The capacity of the tub (in gallons) is:
1
800
2
600
3
500
4
400