two cars leave town at the same time going in the same direc

two cars leave town at the same time going in the same direction on the same road. One travels 32 mi/h and the other travels 47 mi/h. In how many hours will they be 69 miles apart?

Solution

47-32=15 mph is the difference in speeds.
D=RT
69=15T
T=69/15
T=4.6 HOURS THEY WILL BE 69 MILES APART.