Practice problem
Derivation (Proof) of Surface Area of a Sphere
There is a ball with radius 6. Another ball has radius 15. What is the ratio of the sum of the small ball's surface area and volume to the sum of the big ball's volume and surface area?
Practice problem
There is a ball with radius 6. Another ball has radius 15. What is the ratio of the sum of the small ball's surface area and volume to the sum of the big ball's volume and surface area?