How to calculate the volume and area of a sphere?

S = 4 π R ^ 2 (4 R * r)
The center of a cylinder with the bottom radius R and height R is cut out of a circular cone with the same bottom and height. The area of the remaining part is equal to that of a hemisphere when it is cut by a plane. We can draw the conclusion that their volume is equal. The volume of the excavated body is easy to find. It is the volume of the hemisphere. V = 2 / 3 π R ^ 3. Therefore, the volume of a whole sphere is 4 / 3 π R ^ 3. The sphere is formed by circular rotation. The area of the circle is s = π R ^ 2, Then the sphere is its integral. According to the integral formula, the volume of the sphere can be obtained
V=4/3πR^

How to calculate the sphere area and volume

The surface area of the sphere is 4 π R ^ 2
The volume of the sphere is 4 / 3 π R ^ 3

What's the math area
Stair type, oblique view is w, 6 on the left, 5 on the top, 2 on each stair

（6×2+5×2）×2=44

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How to calculate the volume and area of a sphere?