Question

A train 150m long passes an electric pole in 5 seconds. How long will it take to cross a bridge of 180m length

Answer 1

so distance is 150 n

time is 5 sec

wkt

speed=dist/time

speed of train=150/5=30 m/s

so

time=dist/speed

time to cover 180 m length

time=180/30=6 secs

hope this helps