Question

Milwaukee is 121 mi (air miles) due west of Grand Rapids. Maria drives 255 mi in 4.75 h from Grand Rapids to Milwaukee around Lake Michigan. Find
a. Her average driving speed
b. Her average travel velocity.

Answer 1

Average speed = (distance covered) / (time to cover the distance) =

                             (255mi) / (4.75 hr) = 53.68 miles per hour

Average velocity = (displacement) / (time)

       ("Displacement" is the distance and direction from the starting point
         to the end point, regardless of the route taken.)

                           = (121 miles west) / (4.75 hours) = 25.47 miles per hour west