To find the diameter of the hollow rubber ball, we need to determine its radius first.
We know that the surface area of the ball is 50 square feet. Using the formula for the surface area of a sphere, which is A = 4πr^2, we can substitute the given surface area and solve for the radius:
50 = 4πr^2
Dividing both sides of the equation by 4π, we get:
r^2 = 50 / (4π)
r^2 ≈ 3.98
Taking the square root of both sides, we find:
r ≈ √3.98
Now that we have the radius, we can calculate the diameter by multiplying the radius by 2:
diameter ≈ 2 * √3.98
Therefore, the approximate diameter of the hollow rubber ball is approximately 3.16 feet.