To be exact, it is 11/π. For a rough numerical representation of it, it is about 3.50140875.
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The circumference of a circle with the diameter 11 inches is 34.56 inches.
Radius, r = diameter / 2 Then circumference = 2*pi*r and area = pi*r*r
The area of an 11-inch diameter circle is: 95.03 square inches.
circumference = 11*3.14 = 34.54 cm
The circumference of a circle is pi times the diameter. Most people, especially students should remember the value of pi. Having given these clues do you think you can find the circumference. I am sure you can. Good luck!