Machine X and Y produce bottles at their respective constant : Quant Question Archive [LOCKED]
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# Machine X and Y produce bottles at their respective constant

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Manager
Joined: 08 Feb 2006
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Machine X and Y produce bottles at their respective constant [#permalink]

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26 Feb 2006, 21:56
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

Machine X and Y produce bottles at their respective constant rate. Machine X produces K bottles in 6 hours and Machine Y produces K bottles in 2 hours. How many hours does it take Machine X and Y working together to produce 12 bottles?

a. 8
b. 12
c. 15
d. 18
e. 24
Manager
Joined: 14 Jun 2005
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27 Feb 2006, 06:40
I think there is something wrong with the question....K can be 1 or 1000.

It takes X and Y 3/2 hours to produce k bottles, so (3/2)/k per bottle. For 12 bottles, 12(3/2)(1/k)
GMAT Club Legend
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27 Feb 2006, 18:12
Machine X - K/6 bottles in 1 hour
Machine Y - K/2 bottles in 1 hour

Together, 2K/3 bottles in 1 hour

To produce 12 bottles, both will take 18/K hours

Is there a problem with the question? The number of hours depends on the value of K
VP
Joined: 29 Apr 2003
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28 Feb 2006, 02:50
Yeah, whats the value of K? The answers shud be in terms of K!
28 Feb 2006, 02:50
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