Two cars leave Phoenix and travel in the same direction. One car travels 4/3 times as fast as the other. After 6 hours they are 90 miles apart. What are the rates of the cars?

Question

Nickolas Lewis

Mathematics

20 May, 03:35

Two cars leave Phoenix and travel in the same direction. One car travels 4/3 times as fast as the other. After 6 hours they are 90 miles apart. What are the rates of the cars?

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Evelin Miles · Answer 1

Suppose the slow one has a rate of x, then the other one is 4/3 x. After 6 hours we can get an equation of (4/3x-x) * 6=90. We can get x=15 mile/hour. So the other one is 15*4/3=20 mile/hour.