I ned to no what es 5 + 6 for my kindergardin

The radius of the base of a cylinder is 10 centimeters, and its height is 20 centimeters. a cone is used to fill the cylinder with water. the radius of the cone's base is 5 centimeters, and its height is 10 centimeters.

How do i make someone brainliest? (if you answer me, i might be able to make you brainliest! )

If private savings 'v' = 0.75s and total savings 's' equals $4.20 billion, solve for public and private savings.