Question

the length of a train is 50m and it passes a pole in 2 seconds .find the time taken to pass a bridge of length 500 m ,if speed of train be reduced to three - Fifthits initial speed​

Answer 1

Explanation:

Distance covered by train the cross the bridge (from front of engine to back of last wagon )

d=250+50=300 m

Speed of train v=10 m/s

Thus time taken t=

v

d

⟹ t=

10

300

=30 sec

Option B is correct.

Answer 2

Explanation:

approximately 30 seconds