SOLUTION: Two contractors were working together to finish concrete. One can finish 25 square yards in 4 hours. The other can finish 25 square yards in 5 hours. How much concrete can they fin

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Question 446157: Two contractors were working together to finish concrete. One can finish 25 square yards in 4 hours. The other can finish 25 square yards in 5 hours. How much concrete can they finish in 8 hours working together?
Answer by jorel1380(3719) About Me  (Show Source):
You can put this solution on YOUR website!
8/4+8/5=40/20+32/20=72/20
72/20x25=90 sq. yds..