Question 274000
Solve by chart method

            Distance Travelled
Time   Train 60mph    Train 50 mph
Noon        0               0
1PM         60              0   
2PM         120             50
3PM         180             100
4PM         240             150
5PM         300             200
6PM         360             250
7PM         420             300
8PM         480             350
9PM         540             400
10PM        600             450


Answer is when both columns total 500 miles so, answer is 5PM