Diameter = 28 m => radius = 28/2 m = 14 metres.
Then, area = pi*r2 = 615.75 sq metres.
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If the area of a circle is about 28 square inches the diameter of the circle is: about 6 inches (5.971).
It is: pi*28 meters
Area = 615.75
A circle with a diameter of 28 is a circle.
The diameter is 5.97 inches.