The given information is:
- The surface to be painted measures 108,000 in^2
- A gallon of paint will cover 200 ft^2
First, we need to convert the surface to be painted to square feet.
1 foot is equal to 12 inches, then 1 square foot is equal to (12in)^2=144 square inches.
So:
[tex]108,000in^2\times\frac{1ft^2}{144in^2}=750ft^2[/tex]
IF we divide the total surface by the square feet that will cover each gallon, we obtain the number of gallons Becky should buy:
[tex]750ft^2\times\frac{1gallon}{200ft^2}=3.75\text{ gallons}[/tex]
As she need to buy whole gallons, then the answer is she should buy 4 whole gallons.
