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17-07-2017
Mathematics

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It takes 40 minutes for eight people to paint four walls how many minutes does it takes 10 people to paint seven walls

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17-07-2017

8r(40)=4

r=1/80 that is the rate for each person...

10rt=7 using r we found before

10(1/80)t=7

t/8=7

t=56 minutes.

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