Solve the problem.
-Two trains leave a train station at the same time. One travels east at 7 miles per hour. The other traintravels west at 11 miles per hour. In how many hours will the two trains be 144 miles apart?
A)8 hr
B)16 hr
C)4 hr
D)8.5 hr

Question

Quizplus · Accepted Answer

Since the trains are moving in opposite directions, their speeds add up. So, their combined speed is 7 + 11 = 18 miles per hour. To find the time it takes for them to be 144 miles apart, divide the distance by their combined speed: 144 miles / 18 miles per hour = 8 hours.

Solve the Problem. -Two Trains Leave a Train Station at the Same Time