engineering recuitment Cochin Shipyard Executive Trainee Mechanical Mock Test Quantitative Aptitude Time and Work Pipe and Cistern
Pipes A and B can fill an empty cistern in 6 hours and 4 hours respectively, while pipe C can empty the whole cistern in 8 hours. Initially, pipes A and B were simultaneously opened in the cistern. After 2 hours, they were closed and pipe C was opened. After 2 hours, pipe C was also closed. Now, in how much time will the tank be full, if the pipes A and B are simultaneously opened?
1
30 min.
2
45 min.
3
60 min.
4
75 min.