The circumference of a circle can be found by applying the formula 3.14*diameter. To find the area of a circle requires you to use the equation 3.14 * r^2. A change in diameter will affect the circumference. The approximate diameter of the circle 87.14 meters. This means the equation is 1854.7749*3.14, making the approximate area of the circle 5823.99319 m^2. ROund if you need to.