Train travelling at a speed of 54 km/h takes 12sec to cross a man standing on a railway platform. Find the length of the train. Hence find the time taken by the train to cross a bridge of 0.255 KM long.
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Answer:
length of train= 12*(54*1000/60/60)
= 180 meter
now the total distance covered by train is length of bridge + length of train = 435 meters or 0.435 km
so time taken to cross bridge = 0.435/54
= 29 seconds
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