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

ANSWERS

2016-04-22 14:40:09

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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