Question

A railway train 100m long passes over a bridge 400m long at the rest of 72km/h. How long will the train take to cross the bridge? ​

Answer 1

S=D/T

72 kmph= 72*5/18

=20m/s

T = 100+400/20

=500/20

= 25 seconds.

I hope this helps you. Stay safe.

Answer 2

Answer:

Hope it helps , please mark as brainliest

Explanation:

hey mate ,

given ,

distance - 400 m + 100m ( length of train )= 500 m

speed = 72 km/h = 20 m/s

time = distance/speed

= 500/20

=25 second !!