Question 335116
rate * time = distance


time = distance / rate


rate = distance / time


In your problem:


The distance is 7 kilometers.


The time is half an hour.


Use the formula rate = distance / time.


You get:


7 kilometers / .5 hours = 14 kilometers / hour.


That's 14 kilometers per hour.


That's the magnitude portion of the velocity, otherwise known as speed, or rate of travel.


The fact that you are going in a northward direction helps to define the velocity.


Velocity contains speed and direction.


The velocity is 14 kilometers per hour in a northward direction.