Question

A train travelling at a uniform speed clears a platform 200 m long in 10 seconds and passes atelegraph post in 5 seconds. the speed of the train is

Answer 1

length of the station + length of the train=10
" ". ". "=5
_______________(-)___________________
so length of the station is covered in 5s
so speed =200/5
=40m/s.
so distance traveled in 10 s
=40*10
= 400m
so length of the train = 400-200= 200m
speed=40( kmph)(ans).