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Problem solving work problem [#permalink]
30 Nov 2010, 06:03

00:00

A

B

C

D

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Difficulty:

25% (medium)

Question Stats:

93% (02:23) correct
7% (02:15) wrong based on 14 sessions

Pumping alone at their respective constant rates, one inlet pipe fills an empty tank to 1/2 of capacity in 3 hours and a second inlet pipe fills the same empty tank to 2/3 of capacity in 6 hours. How many hours will it take both pipes, pumping simultaneously at their respective constant rates, to fill the empty tank to capacity?

Re: Problem solving work problem [#permalink]
30 Nov 2010, 06:30

Inlet 1 fills x/6 in 1 hour inlet 2 fills (2x/3)/6 = x/9 in 1 hour

so together in 1 hour they will fill x/6 + x/9 = 5x/18 which means to fill 5x/18 it takes 1 hour => to fill x it will take 18/5=3.6 hrs _________________

Respect, Vaibhav

PS: Correct me if I am wrong.

gmatclubot

Re: Problem solving work problem
[#permalink]
30 Nov 2010, 06:30

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