There are 3 pipes P_1, P_2, P_3 attached to a tank. Each Pipe can be used to either fill or empty the tank and havin

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Q 2235545462.     There are 3 pipes P_1, P_2, P_3 attached to a tank. Each Pipe can be used to either fill or empty the tank and having its rate same in both operations. The Filling or emptying rate of these pipes are 3 : 4 : 5. When pipe P_1 and P_2 is opened, it took 4 hr to fill the tank. In the 1st, 2nd and 3rd hours of operation the pipes P_1, P_2, P_3 respectively used for emptying the tank, while the other two pipes are used as filling pipe. What approximate fraction of tank to be filled at the end of three hours?
IBPS-PO 2017 Mock Mains
A

11/5

B

1/11

C

5/11

D

15/11

E

None of these

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