A train 200m long leaves on a bridge 400m long. The train speed is 36 km / h.

A train 200m long leaves on a bridge 400m long. The train speed is 36 km / h. Determine the time the train travels across the bridge.

Initial data: L1 (own train length) = 200 m; L2 (length of the bridge along which the train was moving) = 400 m; V (train speed) = 36 km / h (10 m / s).

The travel time of a train across the bridge can be determined by the formula: t = S / V = (L1 + L2) / V.

Let’s calculate: t = (200 + 400) / 10 = 60 s (1 min).

Answer: The train travel time across the bridge was 1 minute.