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QUESTION
What is the circumference of a circle with diameter of 28 inches?
##28pi##
Circumference of a circle is calculated by the formula ##2*pi*r## where r is the radius of the circle. Here, we are given the diameter of the circle which is equal to ##2*r##. Therefore, we have the radius of this circle by dividing the diameter by ##2##. Then, we have ##2*pi*14=28pi##
