Considering the definition of speed, the speed of Sam is 3.6
.
<h3>Definition of speed</h3>
Speed is a quantity that expresses the relationship between the space traveled by an object. That is, the speed is associated with the change of position of an object in space within a certain amount of time.
The speed can be calculated using the expression:
![speed= \frac{displacement}{time}](https://tex.z-dn.net/?f=speed%3D%20%5Cfrac%7Bdisplacement%7D%7Btime%7D)
<h3>Speed of Sam</h3>
In this case, you know:
- displacement= 9 km
- time= 2.5 h
Replacing in the definition of speed:
![speed= \frac{9 km}{2.5 h}](https://tex.z-dn.net/?f=speed%3D%20%5Cfrac%7B9%20km%7D%7B2.5%20h%7D)
Solving:
<u><em>speed= 3.6 </em></u>![\frac{km}{h}](https://tex.z-dn.net/?f=%5Cfrac%7Bkm%7D%7Bh%7D)
Finally, the speed of Sam is 3.6
.
Learn more about speed:
brainly.com/question/13803208
brainly.com/question/20725831
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