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rate problem - need help!

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by daniyatom » Sun Aug 03, 2008 12:34 pm
Pumps A, B and C operate aty their respective constant rates. Pumps A and B, operating together, can fill a cetain tank in 6/5 hours; pumps A and C operating together, can fill the tank in 3/2 hours; and pumps B and C, operating together can fill the tank in 2 hours. How long doesit take to fill the tank if pump A, B and C operates together.

Need some help ppl :)
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by parallel_chase » Sun Aug 03, 2008 1:57 pm
refer this

https://www.beatthegmat.com/gmat-prep-wo ... 10445.html
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