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Circumference is found by the equation C = 2 * pi * r, where r is the radius and pi is the constant pi.

We are given the diameter. If you look at a circle, the diameter of it is the distance from one end of the circle to the other. We want the radius of the circle. The radius is the distance from any point along the circle to the center of the circle. If we let the diameter = d and the radius = r, we can write a formula for the diameter in terms of the radius.

Because the radius is half of the distance of the diameter,

d = 2*r

15 = 2 * r (divide both sides by 2)

r = 7.5

so C = 2*7.5*pi

C = 15pi

Note that we could have used C = pi*d, although this is not usually how circumference is expressed.

Q: What is the circumference of a circular table with a diameter of 15 inches?

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Circumference = 72*pi

If the table is circular, then its circumference is 18.845 (rounded) If it's not a circle, then the circumference can't be calculated knowing only the area.

A table which is 90 inch around its outside (circumference) is 28.648 inches (to 3 dp) across (diameter).

Circumference of a circle is 2*pi*radius or pi*diameter. Therefor, if the circumference of the table is 15.7 cm then its diameter is 15.7/pi = 4.9975 cm or roughly 5 cm. So the circumferences and diameters of the table and its leg are equal.

circumference = 2 times pi times r OR pi times d diameter = 60 inches pi = 2.1415927 circumference = 2.1415927 x 60 = 128.4956 inches (approximately 128 1/2 inches)

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We're assuming the table and cloth are round? The cloth is a circle with a diameter of 90 inches - 30 from the floor to the table, 30 more across the table, and 30 more to get back down to the floor. The circumference of a circle is pi times the diameter. Do the math!

Hi.. a 5 foot diameter table would have a 15 foot 8 and a half inch circumference.. or in metric it would be 4.788 meters. Paul.

Circumference = Pi X Diameter; Pi (3.141590) x 66 = 207.3 In.

If you are referring to a 48 inch table that means that its diameter is 48 inches, to work out its circumference you have to use the formula C= pi x d. This means that your answer is 3.14... x 48 = 150.8 inches approximately. If the table is 48 centimetres wide then its circumference will be 150.8 cm approximately.

The area of a circular table with an 18-foot circumference is 25.783 feet2

Circumference = 72*pi

If the table is circular, then its circumference is 18.845 (rounded) If it's not a circle, then the circumference can't be calculated knowing only the area.

A table which is 90 inch around its outside (circumference) is 28.648 inches (to 3 dp) across (diameter).

Circumference of a circle is 2*pi*radius or pi*diameter. Therefor, if the circumference of the table is 15.7 cm then its diameter is 15.7/pi = 4.9975 cm or roughly 5 cm. So the circumferences and diameters of the table and its leg are equal.