Question

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. The entire walk took him 3 hours. What is his average speed in km/h?

Answer 1

Ian's average speed in km/h = 1.66

Step-by-step 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