Question

CANT GET WRONG

The area of a circle is 615.44 in2. What is the diameter of the circle? Use 3.14 for π.
A) 14 in
B) 18 in
C) 20 in
D) 28 in

Answer 1

Given:
Area of a circle = 615.44 in²

Area of a circle = π r²
615.44 in² = 3.14 * r²
615.44 in² ÷ 3.14 = r²
196 in² = r²
√196 in² = √r²
14 in = r

diameter = 2r
diameter = 2 * 14in
diameter = 28 inches. CHOICE D.