Question

A proofreader can read 40 pages in one hour. How many pages can this proofreader read in 90 minutes?

Answer 1

`60` Pages

Explanation:

40 Pages in 60 Minutes is the rate.

The proofreader can read 20 Pages in 30 Minutes because of the two equations:
`40/2=20`
`60/2=30`.

Multiply the numbers by `3`.

`20*3=60`
`30*3=90`

We got the Minutes category up to `90`, and now you can see that at `90` Minutes, the proofreader can read `60` Pages.

Yay!