Shelly biked 21 miles in 4 hours. What is shelly's average speak in miles per hour? What is shelly's average speed in miles per hour?

5 1/4 mph

Step-by-step explanation:

21 divided by 4 = 5 1/4

Average Speed = 5.25 mph

Step-by-step explanation:

Given:

Distance = 21 miles

Time = 4 hours

Required:

Average Speed

Formula:

Average Speed = Total Distance Covered / Total Time Taken

Solution:

Average Speed = 21/4

Average Speed = 5.25 mph