SOLUTION: Mr. Santos can mow his lawn in 4 hours. Mr. Cruz can do the same job in 5 hours. How long will it take them to do the job if they work together?

SOLUTION: Mr. Santos can mow his lawn in 4 hours. Mr. Cruz can do the same job in 5 hours. How long will it take them to do the job if they work together?

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Question 1184541: Mr. Santos can mow his lawn in 4 hours. Mr. Cruz can do the same job in 5 hours. How long will it take them to do the job if they work together?
Answer by ikleyn(52788) (Show Source): You can put this solution on YOUR website!
.


     +  = 1


Multiply both sides by 20.


    5t + 4t = 20

      9t    = 20

       t    =   hours = 2   hours.    ANSWER

Solved.

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