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Source: Official Guide for the GMAT 12th Ed. Section 5.3 Problem Solving; #80

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1

Machine A produces bolts at a uniform

Machine A produces bolts at a uniform rate of 120 every 40 seconds, and Machine B produces bolts at a uniform rate of 100 every 20 seconds. If the two machines run simultaneously, how many seconds will it take for them to produce a total of 200 bolts? 22, 25, 28, 32, 56

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Mike McGarry, Magoosh Tutor

Nov 5, 2012 • Comment

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