For a pdf file of this image, click here
Go to the following link which will give you a better understanding of a sphere.
Click on the following link: http://www.mathopenref.com/
Follow the following paths:
Solid Geometry > Types of solid > Sphere > Volume of a sphere
Solid Geometry > Types of solid > Sphere > Surface area of a sphere
Follow the following paths:
Solid Geometry > Types of solid > Sphere > Volume of a sphere
Solid Geometry > Types of solid > Sphere > Surface area of a sphere