SOLUTION: Che drove to Due's house at a rate of 40 mph. He returned by the same route at a rate of 45 mph. The driving time for the round trip was 4hrs. What is the distance Che traveled?

Algebra ->  Customizable Word Problem Solvers  -> Travel -> SOLUTION: Che drove to Due's house at a rate of 40 mph. He returned by the same route at a rate of 45 mph. The driving time for the round trip was 4hrs. What is the distance Che traveled?      Log On

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Question 211478: Che drove to Due's house at a rate of 40 mph. He returned by the same route at a rate of 45 mph. The driving time for the round trip was 4hrs. What is the distance Che traveled?
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
D=RT OR D/R=T
D/40+D/45=4
(45D+40D)/(40*45)=4
85D/1,800=4
85D=4*1,800
85D=7,200
D=7,200/85
D=84.7 MILES IS THE DISTANCE FROM CHE TO DUE'S HOUSE.
2*84.7=169.4 MILES IS THE TOTAAL DISTANCE TRAVELED.