The ratio of the area of a circle to the circumference of the circle ((A)/(C)) is (7)/(1). Find the circumference of the circle. Leave your answer in terms of pi.

Question

The ratio of the area of a circle to the circumference of the circle (
`(A)/(C)`) is
`(7)/(1)`. Find the circumference of the circle. Leave your answer in terms of pi.

Answer 1

`(\pi r^2)/(2\pi r)=(7)/(1)\\ (r)/(2)=(7)/(1)\\ r=14\\\\ C=2\pi \cdot14=28\pi`