Question 897634
Two trains start at the same point going in the same direction on parallel tracks. One train travels at 70 mph and the other travels at 42 mph. In how many hours will they be 154 miles apart?
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70-42=28=speed at which trains are separating
Travel time=distance/speed
154/28=5.5 
In how many hours will they be 154 miles apart? 5.5