Answer: 10 miles per half hour
Step-by-step explanation:
The difference between an hour and half an hour is an hour is 2 times longer than a
hour.
Since we are given the speed per hour, the speed per half an hour is 2 times less than the speed per hour.
We know the speed per hour is 20 miles. If the speed is 2 times less for half an hour, we need to divide
. The answer to that is 10, therefore you will run miles per half hour.
Hope that helped a lot.
:)