The 120 m long train moves evenly across the bridge at a speed of 18 m / h. How long will it take

The 120 m long train moves evenly across the bridge at a speed of 18 m / h. How long will it take to pass the bridge if the length of the bridge is 240 m?

Initial data: L1 (own length of this train) = 120 m; V (constant speed) = 18 km / h (in SI V = 5 m / s); L2 (length of the bridge) = 240 m.

To calculate the time taken by a given train to pass the bridge, we use the formula: t = L / V = (L1 + L2) / V.

Calculation: t = (120 + 240) / 5 = 72 s.

Answer: This train must pass the bridge in 72 seconds.