2.5 × 2.5 × 3.14 = 19.625
The formula to find the area of a circle is radius squared (radius is half the diameter) timed by Pi (3.14).
Therefore the area is 19.625.
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The surface area is 314.16 inches2
The curved surface area is 125.66 square inches.
The surface area of a sphere with a diameter of 7cm is 153.9cm2
Surface area of a sphere = 4*pi*radius2 radius = diameter/2
The surface area is 3217cm2