A jogger runs for half an hour and a distance of 4 miles. The jogger rest for one hour. Then the jogger runs for half an hour and the distance of 5 miles. What is a joggers average speed?

Answer: the joggers average speed is 9 miles per hour.

Step-by-step explanation:

A jogger runs for half an hour and a distance of 4 miles.

Speed = distance/time

Therefore, the speed of the jogger for the first half hour is

4/0.5 = 8 miles per hour

The jogger rest for one hour. Then the jogger runs for half an hour and the distance of 5 miles.

Therefore, the speed of the jogger for the second half hour is

5/0.5 = 10 miles per hour

The average speed of the jogger would be

(8 + 10) / 2 = 18/2 = 9 miles per hour.