Question

Shelly biked 21 miles in 4 hours what is shellys average speed per hour?

Answer 1

The average speed per hour of Shelly is 5.25 minutes.

Explanation:

We can do proportion to solve this.

`(21 \: miles)/(4 \: hours) = (x)/(1 \: hour) \\ (4x)/(4) = (21)/(4) \\ x = 5.25`