Question

A computers fan rotates 2000 times in 40 seconds. How do you find the unite rate in rotations per second?

Answer 1

`50` rotations per second

Explanation:

`2000" rotations"` in `40 " seconds"`
could be written as
`color(white)("XXX")(2000" rotations")/(40" seconds")`

`color(white)("XXX")=(cancel(200)^50cancel(0)" rotations")/(cancel(4)cancel(0)" seconds")`

`color(white)("XXX")=50 "rotations"/"second"`