Ted likes to run long distances. he can run 20km in 95 minutes. he wants to know how many kilometers (k) he will go if he runs at the same pace for 285 minutes
which proportion could ted use to model this situation?
k/20=95/285
or
285/95=k/20
so

It should be written as 20/K=95/285. Why? Because 20 is 95 and K is to 285 because the K is unknown. So you just have to put the two givens together. In order to solve this, all you have to do now is to multiply 20 with 285. Now if you would do this, you will be able to get an answer of 5700. After that, you divide the answer 5700 with 95 so you will get an answer of 60. So while Red would run a distance of 20km in just 95 minutes, he will be able to run a distance of 60km in 285 minutes.