Question

Jack runs 3 miles in 27 minutes. at this constant rate how long will it take him to run 10 miles answer

Answer 1

Let x = the unknown amount of time it takes to run 10 miles. We are going to use this to set up a proportion and then crossmultiply.

$\frac{3 miles}{27 min} = \frac{10 miles}{x min}$

Now we cross-multiply

3x = 27(10)
3x = 270
x = 90

It will take Jack 90 minutes to run 10 miles.

Apologies for the delayed answer. I'm surprised no one saw this before.