document.write( "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? \n" ); document.write( "
Algebra.Com's Answer #490114 by TimothyLamb(4379)\"\" \"About 
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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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\n" ); document.write( "s = 65 + 70 = 135 mph
\n" ); document.write( "s = d / t
\n" ); document.write( "t = d / s
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\n" ); document.write( "t = 348 / 135 = 2.58 hours
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