SOLUTION: two cars leave a rest stop at the same time but go opposite directions. One car travels at 65mph and the other at 70mph. How long will it take for the 2 cars to be 348 miles apart?

Question 814170: two cars leave a rest stop at the same time but go opposite directions. One car travels at 65mph and the other at 70mph. How long will it take for the 2 cars to be 348 miles apart?
Answer by TimothyLamb(4379) (Show Source): You can put this solution on YOUR website!
because the question is only concerned about the relative distance between the two cars, we can simplify the problem into a single car traveling at the combined speed of the two cars:
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s = 65 + 70 = 135 mph
s = d / t
t = d / s
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t = 348 / 135 = 2.58 hours
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