Question

400 metre long train is to cross a Railway Bridge over the river is the bridges 2.1 km long and the train passes over the bridge at a uniform speed of 36 km per hour how much time does the train take to cross the bridge

Answer 1

Length of the train =400m
length of bridge=2.1km=2100m
total length = 400m+2100m=2500m
speed of train =36km/hr
=36*5/18=10m/s
therefore time taken by the train to cross the bridge=2500/10=250secs