Joelle walked for 20 minutes and her speed was 3 miles per hour. So In 1 hour or 60 minutes Joelle walked for a distance of = 3 miles Then In 20 minutes Joelle walked for = (3/60) * 20 miles = 60/60 miles = 1 mile Again Joelle ran for 15 minutes at a speed of 6 miles per hour So In 1 hour or 60 minutes Joelle walked for a distance of = 6 miles so In 15 minutes Joelle walked for a distance of = (6/60) * 15 miles = 15/10 miles = 3/2 miles So The total distance covered by Joelle = 1 + (3/2) miles = (5/2) miles = 2 1/2 miles So Joelle covered a total distance of 2 1/2 miles while walking and running.<span />
