A 150 m long train is moving with a uniform velocity of 45 km/hr. The time taken by the train to cross bridge of length 850 meters
45kmph = 45×5/18 =12.5m/s
total length covered by train= 850m+150m=1000m
t= 1000m/ 12.5m/s
time is taken to cross the bridge is 80 seconds
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