Pipes P and Q can fill the tank in 24 minutes and 32 minutes respectively Both piped are opened toge...........

Quant (SSC) Pipes&cistern

Pipes P and Q can fill the tank in 24 minutes and 32 minutes respectively. Both piped are opened together. To have the tank full in 18 minutes, after how many minutes the pipe P must be closed?

22 minutes

21 minutes

15 minutes

10.5 minutes

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Explanation:

P is to be closed before 18 minutes,
let it is closed after x minutes,
then Q worked for all 18 minutes. So,
(1/24)*x + (1/32)*18 = 1
Solve, x = 10.5

By: Amit Kumar

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Pipes P and Q can fill the tank in 24 minutes and 32 minutes respectively Both piped are opened toge...........

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Explanation:

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