Question

Beth is taking the train to see her boyfriend on Valentine's day! The train is 100 meters long and it takes 30 seconds to cross a 400m bridge. What speed is the train going at?

Answer 1

Speed of the train is 16.666 m/s

Total distance the train has to cover to cross the bridge = length of the bridge + length of the train. 

Reason: The train has to cover 400 metres of the bridge, and its own length of 100 metres to fully cross the bridge.

Total distance = 500 metres

Time taken = 30 seconds

Speed = distance / time

500 / 30 = 16.666 m/s

Answer 2

speed =d/t i.e, 500/30
=36.6m/s