Question 416109
Freight train = x mph
passenger train = x+8 mph
...
time to overtake ==14.25 h

catch up distance = 3x
catch up speed = 8 mph
catch up time = 14.25 h

3x/8 = 14.25
3x=114
/3
x=38 mph speed of freight train
Passenger train speed = 38+8 = 46 mph