A train of length 108 m crosses a bridge at a speed of 40 km/h in 23 seconds. What is the length of the bridge(approx.)?
In 23 seconds the train covers a distance of 23 × 40 × (5/18) = 256 meters. This distance is the sum of the lengths of the train and the bridge. Subtracting the length of the train we get the length of the bridge = 256 - 108 = meters.