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A tank of 425 litres capacity has been filled with water through two pipes, the first pipe having been opened five hours longer than the second. If the first pipe were open as long as the second, and the second pipe was open as long as the first pipe was open, then the first pipe would deliver half the amount of water delivered by the second pipe; if the two pipes were open simultaneously, the tank would be filled up in 17 hours. How long was the second pipe open?

A tank of 425 litres capacity has been filled with water through two pipes, the
first pipe having been opened five hours longer than the second. If the first pipe
were open as long as the second, and the second pipe was open as long as the
first pipe was open, then the first pipe would deliver half the amount of water
delivered by the second pipe; if the two pipes were open simultaneously, the
tank would be filled up in 17 hours. How long was the second pipe open?

Grade:12th Pass

2 Answers

Gautham Pai M K
35 Points
11 years ago

Let the discharges per pipe be A and B litres/hr.

Then , 17(A+B)=425

A+B=25.

From this point of the soultion proceed to check the conditions given in the option.

srikanth katta
18 Points
11 years ago

ans is 15.34 hours it takes

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