Question 366504
Trains A and B are traveling in the same direction on parallel tracks. Train A is traveling at 40 mph and train B is traveling at 50 mph.  Train A passes a station at 7:10 am.  If train B passes the same station at 7:22am, at what time will train B catch up to train A?

Let x = the number of hours it takes train B to catch up with train A 
        after it passes the same station at 7:22am

50x = 40(.2) + 40x
10x = 8
  x = .8 hour = 48 mins

So train B will catch up with train A by 8:10am (7:22 + 48 mins.)