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Bunuel
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chetan2u
Could you explain how you derived the second equation?
One in which pipe Y is closed
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Can you explain the question?
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Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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