Question

You're on a train that is moving at 160 km/h and decide to run
towards the rear of the railroad car. The length of the car is 18 m
and it takes you 5.0 s to go from the front to the back of the car.
What is your speed relative to the tracks?
R_Scott
train speed = 160000 m / 3600 s

run speed = 18 m / 5.0 s

speed relative to the tracks = train speed - run speed