Question

A train 150m long is running at 72km/hr. It crosses a bridge in 30 second, Find the length of the bridge.​

Answer 1

Answer:

72 km/hour

=72×1000/3600 m/sec

=20m/sec

in 30 secs the train covered the distance

20×30m=600m

so ,in 30 secs the train covered it's own length and the length of the bridge

so, length of the bridge =(600-150)m=450 m