Area = pi*3/82 = 0.4417864669 or 0.442 correct to three decimal places
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9pi (about 28 and one quarter) square feet.
The area of a circle with a diameter of 9.4 m is: 69.4 m2
If its diameter is 14 then its area is: pi*72 = 153.938 square inches to three decimal places
If the area of a circle is 8pi, its diameter is: 5.657 units.
Assuming a diameter of 5 inches.The area of this circle is: 19.63