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Math Practice problem #1

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An eastbound car is going 4 miles per hour faster than the westbound car. The cars are 208 miles apart 2 hours after passing each other on the highway. What is the speed, in miles per hour, of the westbound car?

Oct 22nd, 2017

Let the speed of the westbound car be x mph. Then the speed of the eastbound car is (x + 4) mph. In 2 hours after the cars passed each other on the highway they both traveled 2x and 2(x+4) miles, respectively. On the other hand, 2x + 2(x+4) = 208. Solve the equation: 2x + 2x + 8 = 208; 4x = 200; x = 50.

Answer: 50 mph.

Apr 12th, 2015

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