# SOLUTION: Two contractors were working together to finish concrete. One can finish 25 sqaure yards in 4 hours, and the other can finish 25 sqaure yards in 5 hours. How much concrete can they

Algebra ->  Algebra  -> Rate-of-work-word-problems -> SOLUTION: Two contractors were working together to finish concrete. One can finish 25 sqaure yards in 4 hours, and the other can finish 25 sqaure yards in 5 hours. How much concrete can they      Log On

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 Question 434896: Two contractors were working together to finish concrete. One can finish 25 sqaure yards in 4 hours, and the other can finish 25 sqaure yards in 5 hours. How much concrete can they finish in 8 hours working together?Answer by jorel1380(2518)   (Show Source): You can put this solution on YOUR website!1/4+1/5=1/t 5/20+4/20=9/20=1/t 9t=20 t=20/9 The two contractors can finish 25 square yards in 20/9 hours 8/(20/9)=72/20=3.6 3.6x25=90 sq. yds..