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Source: Official Guide for GMAT Review 2016 Problem Solving; #164

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1

It would take one machine 4 hours

It would take one machine 4 hours to complete a large production order and another machine 3 hours to complete the same order. How many hours would it take both machines, working simultaneously at their respective constant rates. to complete the order?

1 Explanation

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1

Mike McGarry, Magoosh Tutor

Aug 17, 2015 • Comment

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