To find the answer, you would subtract the area of the circle from the area of the square. So it would be 2304-1809.56=494.44 The answer is 494.44 square inches.
Well to start the area of the square plus the circle is 2304in2. (since 1 side of the square if 48 in. 48 x 48=2304). The radius of the circle would be 24. (Radii is half the diameter). The formula of area of a circle is πr2. Area of the circle is π24^2 which is 1808.64in2. The area of the space you are looking for is 495.36in2