Ronald is calculating the time required to fill the swimming pool at school. He found that it takes 12 minutes to fill the swimming pool with 108 gallons of water. At what rate does the swimming pool fill, in gallons per minute?
To find the rate at which the swimming pool fills, we need to divide the number of gallons of water by the time it takes to fill it.
Rate = 108 gallons / 12 minutes
Rate = <<108/12=9>>9 gallons/minute
Therefore, the swimming pool fills at a rate of 9 gallons per minute.