A freight train with a length of 630 m moves evenly at a speed of 48 km / h. How long will it take to pass a 100m
| September 4, 2021 | education
A freight train with a length of 630 m moves evenly at a speed of 48 km / h. How long will it take to pass a 100m long passenger train moving towards the opposite direction at a speed of 102 km / h?
Initial data: L1 (length of freight train) = 630 m; V1 (speed of a freight train) = 48 km / h = 13.33 m / s; L2 (passenger train length) = 100 m; V2 (speed of a passenger train) = 102 km / h (28.33 m / s); two trains are moving towards each other.
The duration of the passage of a freight train past a passenger train is determined by the formula: t = S / V = (L1 + L2) / (V1 + V2).
Calculation: t = (630 + 100) / (13.33 + 28.33) = 17.52 s.
Answer: The freight train will pass by the passenger train for 17.52 seconds.
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