Question 255703
 trains A and B are traveling in the same direction on the parallel tracks. train A is traveling 100 miles per hour and train B is traveling at 110miles per hour. Train A passed a station at 7:10pm if train B passes the same station at 7:22pm. At what time till train B catch up with train A?
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722 - 710 = 12 minutes = 1/5 hour
Train A goes 20 miles in that time (100 mph * 1/5 hour) and it 20 miles ahead of train B at 722.
Train B is gaining on train A at 10 mph (110 - 100).
20 miles/10 mph = 2 hours.
722 + 200 = 922 PM