Distance and Spped - If a passenger sitting near the window

If a passenger sitting near the window in a train moving at 40 kmh noticed that it took 3 seconds for the oncoming train to pass by, what was the speed of the oncoming train if the length of the oncoming train was 75 meters.

1)50 kmh
2)52 kmh
3)56 kmh
4)60 kmh
5)70 kmh