The area of a circle can be calculated using this formula:
Where "r" is the radius of the circle.
The circumference of a circle can be found using this formula:
Where "r" is the radius of the circle.
In this case you know that the area of this circle is:
Then, you can substitute this value into the first formula and solve for "r". Use:
Then:
Now you can substitute this value into the formula for calculate the circumference of a circle:
Finally, evaluating, you get:
The answer is: