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

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

Explanation:

Given:

Distance ran by
`2( 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( 1)/(3) miles` = average speed x 20 minutes

=> average speed =
`((2 (1)/(3) miles))/((20 minutes))`

=> average speed =
`(((2 x 3 + 1))/(3) miles)}{(20*(1)/(60) hours)`

=> average speed=
`((((6+1))/(3)))/(((20)/(60)))`

=> average speed =
`( ((7)/(3)))/(((1)/(3)))`

=>average speed =
`(7)/(3)*(3)/(1)`

=>average speed = 7