There are 3 inlet pipes X, Y and Z connected to a tank. If only one pipe is opened at a time, then it takes 50, 40 and 2

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Q 2365167965.     There are 3 inlet pipes X, Y and Z connected to a tank. If only one pipe is opened at a time, then it takes 50, 40 and 25 minutes for pipes X, Y and Z respectively to fill the tank. Find the time taken to fill 99% of the tank if it is known that in every 5 minutes for the first 2 minutes Pipe Y is opened and then closed for 3 minutes, the remaining pipes are always kept open.
IBPS-PO 2017 Mock Mains
A

12 minutes

B

10 minutes

C

15 minutes

D

14 minutes

E

17 minutes

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

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