a rectangle billboard is 30 feet by 18 ft. if a gallon of paint cover 250 square feet how many gallons should be purchase to cover the entire billboard

We are given dimension of billboard as 30 feet by 18ft.

since billboard is a rectangle so Area = l * b

Area of billboard = 30*18=540 feet square

1 gallon of paint covers 250 square feet

so for 540 square feet paint needed = 540/250 = 2.16 gallons

Answer: 2.16 gallons should be purchased to cover the entire billboard