How to find the radius of a sphere when given the surface area. 

We will use the formula of the surface area of a sphere to find the radius of the sphere.

Answer: r = (A / 4π)^0.5

Let us see how we will use the formula of the surface area of a sphere to find the radius of the sphere.

Explanation:

The formula to find the surface area of the sphere is given by A = 4π × r².

Now to find the area from the surface area formula we use the following steps.

Step 1- Transpose 4π on the left-hand side, which makes the equation as  A/4π = r² 

Step 2- Now taking square roots on both hand sides we get,  r = (A / 4π)^0.5

Hence, r = (A / 4π)^0.5 is the value of radius if the surface area of a sphere is known.