If the area of a circular table is 25pi what would be the radius, diameter and circumference

Question

The area of a circular table is 25pi. Identify the radius, diameter, and circumference( in terms of pi ) for the circular table.

Answer 1

Area of a circle, A, is given by the formula A = pi x r² = 25 pi

So 25 pi = pi x r² _{or r}² = 25 so r = 5

Therefore the diameter d = 2 x r = 2 x 5 = 10

The circumference, C, is given by the formula: C = 2 x pi x r

So C + 2 x pi x 5 = 10 x pi