I am hoping someone can point me in the right direction. I have no idea where to start.

Trains A and B are traveling in the same direction on parallel tracks. Train A is traveling at 80 mph and B at 84 mph. Train A passes the styation at 7:20 pm. If train B passes the same station at 7:50 pm, at what time will train B catch up to train A?

Thank you for any help.