Source: Official Guide for the GMAT 12th Ed. Section 5.3 Problem Solving; #126

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? 7/12, 1 1/2, 1 5/7, 3 1/2, 7

1 Explanation

1

Gravatar Mike McGarry, Magoosh Tutor

Nov 6, 2012 • Comment

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Section 5.3 Problem Solving

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