Picture given in description has the question:Q2

Question

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

Comments

Should the answer be 80s or 92s?

Answer 1

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

Comments

Why did you add 150 just once and not twice?