The formula for the area of a circle is A = πr^2 or A = (π/4)d^2, where r is the radius and d is the diameter.
Given that the area is 615.44 in^2, we can use the second formula to solve for the diameter:
A = (π/4)d^2
615.44 = (3.14/4)d^2
615.44 * 4 / 3.14 = d^2
782.72 = d^2
d = sqrt(782.72)
d ≈ 28
So the diameter of the circle is approximately 28 inches. The answer is B.
The area of a circle is 615.44 in2
. What is the diameter of the circle? Use 3.14 for π.
Responses
A 18 in18 in
B 28 in28 in
C 14 in14 in
D 20 in20 in
E 24 in
1 answer
2 answers