Question

Ronald is calculating the time required to fill the swimming pool at school. He found that it takes 9 minutes to fill the swimming pool with 81 gallons of water. At what rate does the swimming pool fill, in gallons per minute?

Answer 1

It takes 9min

Explanation:

9min:8g

÷9 ÷9

1min:9g

The swimming pool fills at 9 gallons per minute.

Answer 2

9

Explanation:

81 gallons per 9 minutes

This can be thought of as a fraction:

`(81gallons)/(9 minutes)`

divide the top and bottom of the fraction by 9 to make the bottom 1

`(9 gallons)/(1 minute)`

remove the gallons per minute to a separate fraction

9
`(gallons)/(minute)`