Question

A train 100m long moving on a straight level track passes a pole in 5 sec. Find the speed of train (b) the time it will take to cross a bridge 500 m long

Answer 1

Thanks for asking the question.
(a) d=100m     
t=5sec     
 v=?   
Therefore,             
 v=d\t       
=100\5                       
=20m\s

(b) d=500m     
t=?     
v=20m\s
Therefore,                 
v=d\t                 
 t=d\v                   
 =500\20                   
=25sec

Hope it helps.

Answer 2

Hello mate here's ur solution_____________

a) speed of train =. distance/time
= 100m/5sec=20m/sec

b) time to cover 500 m long bridge = distance /speed
=500/20sec = 25 sec