Question

Becky want to paint walls in her room a gallon of paint will cover 200 feet 2. She measures the surfaces to be painted; 108,000 on 2. How many gallons of paint should she buy?

Answer 1

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:

`108,000in^2*(1ft^2)/(144in^2)=750ft^2`

IF we divide the total surface by the square feet that will cover each gallon, we obtain the number of gallons Becky should buy:

`750ft^2*(1gallon)/(200ft^2)=3.75\text{ gallons}`

As she need to buy whole gallons, then the answer is she should buy 4 whole gallons.