Question

A train takes 2h to reach station B from station A and then 3 h to return from station B to station A . The distance between the two station is 200km . Find the average speed . and the average velocity of the train.​

Answer 1

Answer:

The answer is 80 km /hr look at picture for explanation

Answer 2

${\mathfrak{\red{\underline{\underline{Solution:-}}}}}$

$\sf{While\;moving\;from\;A\;to\;B,time\;taken\;is=2\;hours}$

$\sf{While\;moving\;from\;B\;to\;A,time\;taken\;is=3\;hours}$

$\sf{Distance\;between\;A\;and\;B\;is\;200\;Km.}$

$\sf{Now,}$

$\sf{Total\;distance\;travelled=200+200=400\;Km}$

$\sf{Total\;time\;taken\;is=2+3=5\;hours}$

$\sf{So,average\;speed=\dfrac{400}{5}=80\;Km/h}$

Now, for average velocity, the total displacement is 0, since, the initial and final point is same, A. So, average velocity is Zero.