Trains A&B are traveling in the same direction on parallel tracks. Train A is traveling 100mph;Train B110mph.?

Train A passes a station at 12:25 p.m.. If Train B passes the same station at 12:55p.m., at what time will train B catch up to train A?

5:55 PM

At 12:55 PM, train B is 50 miles ahead of train A, since it has gone 100mph for thirty minutes since passing the station that train A has just passed. Because it is travelling 10mph faster than train A, train B gains 10 miles on train A every hour and will therefore need five hours to make up the fifty miles between them.

1/ Train B travel 10mph faster than train A.

2/ Train A has a 30 minutes head start (passing the station at 12:25pm versus train B at 12:55pm) and travel at 100mph.

3/ Therefore, train A has a head start of 50 miles.

4/ So it would take train B five (5) hours to catch up with train A.

Hope this helps!