Indirect proportion : word Problem

May 14th, 2015
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There are 810 dishes that need to be rinsed. John can rinse them in 135 minutes by himself. It will take his friend Bob 90 minutes to rinse these dishes. How long will it take them if they rinse these 810 dishes together?

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There are 810 dishes that need to be rinsed. John can rinse them in 135 minutes by himself. It will take his friend Bob 90 minutes to rinse these dishes. How long will it take them if they rinse these 810 dishes together?Solution:Time required to rinse 810 dishes by John = 135 minutes Henc

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