Question

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

Answer 1

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 2

Answer:

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

Step-by-step explanation:

Given:

Distance ran by $2\frac{ 1}{3} miles$

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, $2\frac{ 1}{3} miles$ = average speed x 20 minutes  

=> average speed = $\frac{(2 \frac{1}{3} miles)}{(20 minutes)}$

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

=> average speed=$\frac{(\frac{(6+1)}{3})}{(\frac{20}{60})}$

=> average speed = $\frac{ (\frac{7}{3})}{(\frac{1}{3})}$

=>average speed = $\frac{7}{3}\times\frac{3}{1}$

=>average speed = 7