How to calculate the volume of a circle

How to calculate the volume of a circle

4 / 3 * R3

The height of a cylinder is 4 times of that of B cylinder, and the volume of a cylinder is () times of that of B cylinder

Idea: the cylinder calculation formula v = s bottom * height, since the bottom area is equal, the volume ratio is the ratio of height
The height of a cylinder is four times that of B cylinder, and the volume of a cylinder is (4) times that of B cylinder

The base area and height of a cylinder and a cone are equal respectively. The volume of a cone is () times that of a cylinder, and () times that of a cone

One third
triple

1) The bottom area and height of a cylinder and a cone are equal respectively. The volume of a cone is () of the volume of a cylinder, and the volume of a cylinder is () of the volume of a cone
(2) The volume sum of a cylinder and a cone with equal base and height is 96 cubic decimeters, the volume of a cylinder is () cubic decimeters, and the volume of a cone is () cubic decimeters
(3) The volume of a cone with equal base and height is () less than that of a cylinder
(4) The base radius of a cone is 2 cm, the height is 9 cm, and the volume of a cone is ()
5. Use a 5 cm square paper to form a cylinder. The height of the cylinder is () cm and the side area is () square cm
6. Make a bottom diameter of 4 decimeters, 8 decimeters high cylindrical ventilation pipe, a total of iron sheet () square decimeters
7. The perimeter of the bottom of a pole is 50.24 cm. The pole covers an area of () square cm
8. When the height of a cylinder remains unchanged, the radius of the bottom surface increases by 3 times, the surface area increases by () times, and the volume increases by () times
Formula calculation
1. A cone has a volume of 15.7 cubic decimeters and a bottom area of 3.14 square decimeters. How many decimeters is its height?
2. The ratio of the height to the bottom diameter of the cylindrical uncovered iron bucket is 3 ∶ 2, and the bottom diameter is 4 decimeters. How many square decimeters of iron are needed to make such two buckets? (the number is reserved for the whole ten square decimeters)
3. A cylindrical container with a bottom radius of 4 decimeters and a height of 6 decimeters is filled with water. Pour the water into a cube container with an edge length of 8 decimeters. What is the depth of water?
8. A section of steel can be used as a cylindrical part with a bottom diameter of 8 cm and a height of 9 cm. If it is transformed into a conical part with a height of 12 cm, how many square centimeters is the bottom area of the part?

1) The area and height of the bottom of a cylinder and a cone are equal respectively. The volume of a cone is (1 / 3) of the volume of a cylinder, and (3 times) of the volume of a cone. The volume of a cylinder and a cone with equal bottom and height is 96 cubic decimeters, the volume of a cylinder is (72) cubic decimeters, and the volume of a cone is (...)