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Two pipes can fill a tank in 10 hours and 12 hours respectively while a third pipe empties the full tank in 20 hours.If all the three pipes operate simultaneously, in how much time will the tank be filled?
A. 7 hrs 30 min
B. 7 hrs 45 min
C. 8 hrs 30 min
D. 8 hrs 45 min

Read Solution (Total 1)

1/10+1/12-1/20=2/15
so 15/2 is equal to 7:30
option A is correct
8 years agoHelpfull: Yes(0) No(0)

GENPACT Other Question

A pump can fill a tank with water in 2 hours. Because of a leak, it took 2x1/3 hours to fill the tank. The leak can drain all the water of the tank in
A. 5 hours
B. 7 hours
C. 8 hours
D. 14 hours A leak in the bottom of a tank can empty the full tank in 8 hours. An inlet pipe fills water at the rate of 6 litres a minute. When the tank is full, the inlet is opened and due to the leak, the tank is empty in 12 hours. How many litres does the cistern hold ?
A. 7580
B. 7960
C. 8290
D. 8640