The length of the bridge, which a train 130 metres long and travelling at 45 km/hr can cross in 30 seconds, is:

Given

• Train length = 130 m
• Speed = 45 km/h
• Total crossing time = 30 s

ComputeSpeed = 45 × (5/18) = 12.5 m/sTotal distance = 12.5 × 30 = 375 m = train + bridgeBridge = 375 − 130 = 245 m