Question 925630
Distances will be the same the faster train catches  the slower one 
t the time for the slower train
35kph(t) = 40kph(t-1)
40 = 5t
8hr = t, the time for the slower train
..........
 How far from station M will the faster train catch the slower one?
Distance traveled: 35kph(8hr) = 280mi