Question

you paint four walls. each wall is a rectangle with a length of 18 feet and a height of 12 feet. one gallon of paint covers about 320 square feet. how many gallons of paint do you need in order to cover all four walls? type your answer as a decimal.

Explanation:

Step1: Calculate area of one wall

Area of rectangle: $\text{Length} \times \text{Height} = 18 \times 12 = 216$ square feet

Step2: Calculate total area of 4 walls

Total area: $4 \times 216 = 864$ square feet

Step3: Compute required paint gallons

Gallons needed: $\frac{\text{Total Area}}{\text{Coverage per Gallon}} = \frac{864}{320}$

Answer:

2.7 gallons