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machine rates

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john_haddock
 Post subject: machine rates
 Post Posted: Fri May 22, 2009 12:15 am 
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Course Students


Posts: 6
machine x and y work at their respective rates. how many more hours does it take machine Y to fill a production order of a certain size than it takes machine x working alone?

(1) Machine X and Y fill production order in two thirds the time that machine x working alone does
(2) Machine Y working alone fills the production order of this size in 2x the time that machine X working alone does
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RonPurewal
 Post subject: Re: machine rates
 Post Posted: Fri May 22, 2009 6:51 am 
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ManhattanGMAT Staff


Posts: 7146
this problem is solved here:
post15727.html

this is one of those instances in which a user posted a solution that was so good that we didn't even need to add to it.
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