High School

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Two cars leave towns 640 kilometers apart at the same time and travel toward each other. One car's rate is 14 kilometers per hour more than the other's. If they meet in 4 hours, what is the rate of the faster car?

Do not do any rounding.

Answer :

The rate of the faster car would be 87 kilometers per hour.

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Rewritten by : Barada

Car A = 14 + Car B
4(Car A + Car B)=640

A=B+14
4(A+B)=640

A=B+14
A+B=160

(B+14) + B= = 160
2B+14=160
2B=146

B=73 A= 87

73+73+73+73+87+87+87+87
292+348=640

I think the faster car went 87 kilometers per hour.