A contractor finds that 5 gallons of paint will cover 1125 sq ft of wall area. How much wall area could be covered with 30 gallons of paint?
If 5 gallons of paint cover 1125 square feet of wall area, you can find out how much area 30 gallons will cover by setting up a proportion, since the relationship between the amount of paint used and the area covered is directly proportional.
First, calculate the coverage per gallon:
1125 sq ft / 5 gallons = 225 sq ft per gallon
Now, determine how much area 30 gallons can cover:
225 sq ft/gallon * 30 gallons = 6750 sq ft
Therefore, 30 gallons of paint could cover 6750 square feet of wall area.