Question

Travelling with a speed of 45 km/hr , a train crosses a 120 meter long bridge in 40 seconds . Find the length of the train ..​

Answer 1

speed in m/s 45*(5/18)= (25 / 2 )m/s

length of train

train crosses 120 m in 45 sec

to cross completely it should travel 120+x distance

so in to just travel 120 m it will take

(120*(2/25)) = (48/5) m/s

so length of the train x = (25/2)*(40-(48/5))

x= 42.1 meters