A train 250 m long passes a pole in 10 seconds and a bridge in 25 seconds. Find the length of the bridge.
Ajay's driving speed for a 6 hour trip was 65 km/h Du
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Time = 10 seconds
Distance = 250m (since it crosses the pole)
Speed = Distance/time
Speed = 250/10
speed = 25m/s
Now in case of bridge
t = 25 seconds,
Speed = 25m/s
Distance = length of train + length of bridge
Also, distance travelled = Speed x time
=> 25 x 25 = 625metre
But we know that distance = length of train + length of bridge (since the train crosses the bridge, its own length will also be added to get distance)
=> 250 + length of bridge = 625
=> length of bridge = 625 - 250 = 375 m
Length of bridge is 375m
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