How would you tell the speed of a passing train?

[KKF]

Re: How would you tell the speed of a passing train?

@STA

v = distance / time

you need to know the distance between station A and station B.
when train leave from station A, turn on stop watch and stop when it reach to station B.

nahiiN yaaraa…you are just standing by the track side and you just watched a train pass by…you don’t have the distance between stations and/or the arrival and departure time at the stations