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?
+36916 First auto has a 2 x 60 = 120 mile headstart
Closing speed of the second auto is 80 - 60 = 20 m/hr it will take 120 m / 20 m /hr = 6 hours to catch the first auto
