Answer:
Average speed, v = 1.66 km/h
Step-by-step explanation:
It is given that, Ian walks 2 km to his best friend’s house, then walks 0.5 km to the library. He then makes a 2.5 km walk home.
Total time taken in the entire walk, t = 3 hours
We need to find the average speed of the Ian during his journey.
Total distance covered is,


Average velocity,

So, the average speed during the entire journey is 1.66 km/h. Hence, this is the required solution.