One automobile starts out from a town at 8 a.m. and travels at an average speed rate of 60mph. 2 hours later, a second automobile starts out to overtake the first. If the second automobile travels at an average rate of 80mph, how long will it travel before it overtakes the first?
+36915 The distance betqeen the two autos is 2 x 60 = 120 miles
the closing rate is 80 m/hr - 60 m/hr = 20 m/hr
120 miles / 20 m/hr = 6 hours to catch first auto after second begins
