Answer:
15mil/hr
Explanation:
To make the average speed in mph, we need to get the 40 minutes to an hour. We multiply 40 minutes by 3/2 to get 60 minutes or an hour.
40 x (3/2) = 60
This means that we need to multiply 10 miles by 3/2:
10 x (3/2) = 15 (we get 15 miles)
Average speed is equal to distance over time.
Average speed is 15mil/hr.
Hope this helps!
