A railway train 50 m long passes over a bridge 250 m long at the rate of 12 km/h. How long will it take to completely pass over the bridge?

From the instant when the nose of the locomotive reaches the beginning of the bridge, it has to travel the whole 250m to get to the other end of the bridge, and then it has to travel another 50m to get the rest of the train off the bridge. So it has to travel 300m to get everything it's pulling across the bridge.
Time = distance/speed = 300m / (12,000 m/hr) = 0.025 hour = 1 minute 30 sec

Answered by AL2006 | 2024-06-10

Pretty slow that train ;)
t=s/v v=12 km/h=10/3 m/s s=250+50=300 m
t=300/(10/3) t=300 3/10 t=30 3
t=90 s=1.5 min

Answered by konrad509 | 2024-06-10

The train must cover a total distance of 300 m to completely pass over the bridge. At a speed of approximately 3.33 m/s, it will take about 90 seconds for the train to clear the bridge. Therefore, the time taken by the train to completely pass over the bridge is approximately 90 seconds.
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Answered by AL2006 | 2024-12-24