As the question depicts the trail is 10Km long but the end of the trail is 300m north from the beginning, Here the average velocity comes out to be 100m/hr.
<h3>What is Velocity?</h3>
Velocity is defined as the displacement covered by an object or a body in unit time interval.
From the problem, it is clear that the distance is 10Km but the displacement comes out to be 300m.
The time from 2:00 pm to 5:00 pm is a total of 3hours.
Now, the velocity is determined from the following formula

here,
d= displacement
t= time
So, by putting values in above formula we get,


So, the average velocity of Sofia is 100m/hr
To Know more about velocity
brainly.com/question/862972