Train A and B are traviling the same direction on parallel t

Train A and B are traviling the same direction on parallel tracks. Train A is traviling at 100 miles per hour and train B is traviling at 120 miles per hour. Train A passes a station at 5:25 p.m. If train B passes the same station at 5:40 p.m., at what time will train B catch up with train A?

Solution

100T=120(T-.25)
100T=120T-30
100T-120T=-30
-20T=30
T=-30/-20
T=1.5 HOURS AFTER TRAIN A LEAVES THE STATION B TRAIN WILL CATCH UP.
5:25+1:30=6:55 IS THE CATCH-UP HOUR.