Divide the diameter by the value of Pi and you'll have your answer. Hint: it's more than 3.5 but less than 4.0 !
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78.53981634 or 79 square feet rounded to the nearest square foot.
Area of a circle = pi*radius2 Area = pi*13.52 = 572.5552611 or 573 square feet to the nearest square foot.
The square foot area of a 41-foot diameter circle is: 1,320 square feet.
The area of a circle with a 7-foot diameter is: 38.48 square feet.
Total surface area of a cylinder = (2*p*radius2)+(pi*diameter*height)Total surface area = 1130.973355 or 1131 square feet to the nearest square foot.