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GMATPrep question 21

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by syv11 » Mon Nov 26, 2007 8:48 pm
6 machines ..... take 12 days
1 machine .... takes 72 days (=6*12)
72/8 = 9 machines ... take 8 days
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by mchen01 » Mon Nov 26, 2007 9:03 pm
Thanks.
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