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Joined: 01 Oct 2013
Posts: 1
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Hello [#permalink] New post 01 Oct 2013, 16:03
Dear guys ,
it's the first time to be here , I'm starting studying for GMAT , and found one question in rates problems , and i need ur help.the question is:-
we have one tank, containing 7200Liter of water, valve A is feeding the tank by water in 100 lit/min, valve B is draining the tank by 300 lit/min, 70 lit/min of them is returning back to the long it will take to empty the tank?
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Re: Hello [#permalink] New post 01 Oct 2013, 16:05
Expert's post
Please review the GMAT Club posting rules and please make sure you post in the proper forum with the proper subject. Your question looks like it is most suited for the PS Forum. That's here: gmat-problem-solving-ps-140/

And for your info: new-to-the-gmat-club-start-here-130870.html

And one more: rules-for-posting-please-read-this-before-posting-133935.html

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Re: Hello   [#permalink] 01 Oct 2013, 16:05
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