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The formula for the area of a circle is A = Οr^2 or A = (Ο/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 = (Ο/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 β 28
So the diameter of the circle is approximately 28 inches. The answer is B.