SOLUTION: A car takes 2 hours to travel a certain distance between two cities. If the speed of travel diminishes by 20km per hour, it will add 30 minutes of travel time. What is the distan

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Question 855084: A car takes 2 hours to travel a certain distance between two cities. If the speed of travel diminishes by 20km per hour, it will add 30 minutes of travel time. What is the distance between the two cities.
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
r*2=d
(r-20)(2.5)=2r
2.5r-50=2r
.5r=50
r=100
d=80*2.5=200
d=2*100=200