Question 221465
It takes a train 7 seconds to pass by a stationary observer and 26 seconds to travel the length of a station 380 meters long.
 What is the speed of the train and its length?
:
let s = speed of the train in meters/sec
:
7s = length of the train
:
time of the front of the train passing the platform
It passes the platform 26-7 = 19 sec
:
s = {{{380/19}}}
s = 20 meters/sec
:
Train length = 7s
7(20) = 140 meters long
:
The speed of train in km/hr = {{{(3600*20)/1000}}} = 72 km/hr