The train leaves station at 6:00 P.M. traveling west at 80 mi/h. On the parallel track, second train leaves station three hours later traveling west a 100 mi/h. At what time will second train catch up with first? The passenger train's speed is 60 mi/h, and freight train's speed is 40 mi/h. Passenger train travels same distance in 1.5 h less time than freight train. How long each train takes to make trip?