Johnnie runs 4.5 km everyday to stay in shape. It takes him 30 minutes to run his route. What is his average speed per hour?

The average speed is 9 km per hour

Step-by-step explanation:

Average speed = total distance ÷ total time

Let us use this rule to solve the question

∵ Johnnie runs 4.5 km every day

∴ The total distance = 4.5 km

∵ It takes him 30 minutes to run his route

∴ Total time = 30 minutes

→ We need to change the time to hours to find the average speed in km/h

∵ 1 hour = 60 minutes

→ Divide the time by 60 to change it from minutes to hours

∴ Total time = 30/60 = 0.5 hour

∵ Average speed = distance ÷ time

∴ Average speed = 4.5 ÷ 0.5

∴ Average speed = 9 km/h

∴ The average speed is 9 km per hour

the first and the last one.

Step-by-step explanation: