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# Machines X and Y work at their respective constant rates.

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Senior Manager
Joined: 22 Jun 2005
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Location: London
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Kudos [?]: 5 [0], given: 0

Machines X and Y work at their respective constant rates. [#permalink]  28 May 2006, 06:21
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Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 2 sessions
Machines X and Y work at their respective constant rates. How many hours does it take machine Y, working alone, to fill a production order of a certain size than it takes machine X, working alone?

1, Machines X and Y, working together, fill a production order of this size in two-thirds the time that machine X, working alone, does.

2, Machine Y, working alone, fills a production order of this size in twice the time that machine X, working alone, does.

Director
Joined: 06 May 2006
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The order size, the rates - everything appears to be unknown...

VP
Joined: 21 Sep 2003
Posts: 1065
Location: USA
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Kudos [?]: 39 [0], given: 0

Agree both 1 and 2 provide the same info. Rate of Y = 2*rate of X, but order size is not ptovided.

Hence E.
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Director
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http://www.gmatclub.com/phpbb/viewtopic ... ates+hours
good explanation here
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