Answer:
Explanation:
Given
Wall is [tex]500 ft^2[/tex] in area
[tex]160\ ft^2[/tex] requires 1 gallon of paint
so using unitary method
[tex]1\ ft^2 requires \frac{1}{160}[/tex] gallon of paint
[tex]500 ft^2[/tex] wall will require [tex]=500\times \frac{1}{160}[/tex] gallons of paint
[tex]=3.0125\ gallons[/tex]
