Asked by Reyna
Sally can paint a fence in hour 30 minutes, but she calls Max to help and together they paint the fence in hour. How long would Max take if he were to paint the fence alone?
Answers
Answered by
Steve
add up the amounts (fraction of the total job) done by them in one minute:
1/90 + 1/m = 1/60
1/90 + 1/m = 1/60
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