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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Solution
(Provided By a Student and Checked/Corrected by EXXAMM.com Team)

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