A 600 m long train travels over a 1 km long bridge at a speed of 80 km / h. To find time.

Problem data: L1 (length of the train under consideration) = 600 m; L2 (bridge length) = 1 km (in SI L2 = 1000 m); V (speed of the train in question) = 80 km / h (in SI V = 22.22 m / s).

The time taken by the train under consideration to pass the bridge is determined by the formula: t = S / V = (L1 + L2) / V.

Let’s make the calculation: t = (600 + 1000) / 22.22 = 72 s.

Answer: The train in question will cross the bridge in 72 seconds.