Answer:
Ian's average speed in km/h = 1.66
Explanation:
We know that average speed is the ratio of distance traveled and time taken for that distance to cover.
In this case 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.
So total distance traveled = 2+0.5+2.5 = 5 km
Time taken for this 5 km distance travel = 3 hours
So average speed = 5/3 =1.66 km/hour
Ian's average speed in km/h = 1.66
