what is the answer to this question?

Question

For every one gallon of paint, Rick, the painter, can cover 300 square feet with a single coat. To the nearest tenth, how many gallons will Rick need in order to cover a circular region with a radius of 30 feet?

Answer 1

Area of a circle = πr²

 

The radius, r of the circular area needing paint = 30 ft

Area = 2827.4 ft²

 

One gallon of paint covers 300 ft²

 

2827.4 ft² / 300 ft² = 9.4 gallons of paint