Pipes A and B fill a tank in 5 and 6 hours respectively. Pipe C empties the tank in 12 hours, if you open all the three pipes together this tank will be filled in?
A.3 9/17 hours
B.4.5 hours
C.1.25 hours
D.4 7/17 hours
Answer:A
Pipes A and B fill a tank in 5 and 6 hours respectively. Pipe C empties the tank in 12 hours, if you open all the three pipes together this tank will be filled in?
A.3 9/17 hours B.4.5 hours C.1.25 hours D.4 7/17 hours