Find the area of a circle with a diameter of 20 inches. Use 3.14 for pi.

d = 20 inches

r = d/2 = 20/2 = 10 inches

Area = πr^2

= 22/7 * 10^2 inch^2

= 2200/7 inch^2

= 314.2 inch^2

Therefore, Answer is B. 314.2 in^2 Ans

You find the area of a circle by finding the radius and multiplying. The radius is a half of the diameter, so the radius of your circle is 10. The area of the circle is 100pi because the diameter is 10, and to find the area you multiply the radius by itself. 10*10=100