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in Physics by (2.8k points)

A 150 m long train is moving with a uniform velocity of 45 km/h. The time taken by the train to cross a bridge of length 850 meters is

by (2.8k points)
Should the answer be 80s or 92s?

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1 Answer

+1 vote
by (65.0k points)

45kmph=12.5m/s

total length discovered by train=850m+150m=1000m

velocity=Dispacement/time

t=s/v

t=1000m / (12.5m/s)

t=80s

time taken to cross the bridge is 80s

by (2.8k points)
Why did you add 150 just once and not twice?

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