Question

a train 110 m long is moving with a uniform velocity of 45 km/h find the time it will take to cross a bridge 1 km long

Answer 1

Length of the bridge = 1 km
Length of the train = 110 m = 0.11 km
velocity of the train, v = 45 km/h
The total distance covered by the train in crossing the bridge, d = length of train + length of bridge = 0.11 + 1 = 1.11 km
Therefore, the time taken by the train to cross the bridge, t = d/v = 1.11/45 = 0.0247 hour = 1.48 minutes =88.8 s