Question

3. A train passes telegraph post in 40 seconds
moving at a rate of 36 km/h. Then the length of
the train is
(A) 500 m
(B) 400 m
(C) 450 m
(D) 395 m
​

Answer 1

v=36kmph=10m/s

t=40s

so,

length of train=distance covered by train in 40sec=40×10=400m Ans.✌️

Answer 2

Answer:

400m hope it's helpful pls mark me as brainleast