# Two cars leave town going opposite directions. One car is traveling 55 mph, and the other is traveling 65 mph How long will it take before they are 180 miles apart?

Sep 30, 2015

After any time $x$ the cars will be $55 x + 65 x$ miles apart, so we are looking for such a number $x$ for which $55 x + 65 x = 180$
$120 x = 180$
$x = \frac{3}{2} = 1.5$