Question

a train passes over a bridge if speed of train is 30m/s and train takes 20 seconds to cross the bridge find the length of the bridge when length of train is 120 meters

Answer 1

Hii friend,

We know that formula,

Velocity = distance/time

Distance=velocity ×time

Distance = 30×20

Distance= 600m.

length of the bridge =600-120

Length of the bridge=480m.

Hope this helps you a little!!!

Answer 2

distance travelled=velocity multiply time

                            =>   30*20

                           =>600 m

but given train length =120 m

so distance 600-120

=>480 m