Question

A man is standing on a railway bridge which is 180 m long. He finds that a train crosses the bridge in 20 seconds but himself in 8 seconds. Find the length of the train

Answer 1

We will visualize as the train is passing the bridge

Length of the bridge = 180 meters
time = 20 seconds
speed = distance/time = 9 m/a

We will visualize the train passing the man
velocity = 9m/s
time =8seconds
distance = velocity × time = 72m

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