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GMAT Prep2(Bottles)

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by aatech » Wed May 14, 2008 10:41 am
in 6 hours machine x produces K bottles

so, in 1 hour it will produce K/6 bottles

Similarly, in 1 hour machine y will produce K/2 bottles

Together, in 1 hour they will produce K/6 + K/2 = 4K/6 bottles

4K/6 bottles can be produced in 1 hour

1 bottle can be produced in 6/4K hours

12K bottles will be produced in [6*12K]/4K = 18
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