Mathematics

Question

What is the average speed of a runner if he ran 2 1/3 of a mile in 20 minutes?

2 Answer

  • 7 MPH because 2 1/3
    in 20 minutes. So you multiply 20 by 3 you get 60. Then you multiply 2 by 3 you get 6. Then you multiply 1/3 x 3 and you get 1. 6=1=7                    Hope This Helps
  • Answer:

    The average speed of the runner is 7 miles per hour.

    Step-by-step explanation:

    Given:

    Distance ran by [tex]2\frac{ 1}{3} miles[/tex]

    Time taken  by the runner = 20 minutes.

    To find:

    The average speed of a runner=?

    Solution:

    Now, we know that ,

    distance = speed x time

    Then, [tex]2\frac{ 1}{3} miles[/tex] = average speed x 20 minutes  

    => average speed = [tex]\frac{(2 \frac{1}{3} miles)}{(20 minutes)}[/tex]

    => average speed = [tex](\frac{(2 x 3 + 1)}{3} miles)}{(20\times\frac{1}{60} hours)[/tex]

    => average speed=[tex]\frac{(\frac{(6+1)}{3})}{(\frac{20}{60})}[/tex]

    => average speed = [tex]\frac{ (\frac{7}{3})}{(\frac{1}{3})}[/tex]

    =>average speed = [tex]\frac{7}{3}\times\frac{3}{1}[/tex]

    =>average speed = 7