A conical part, the bottom area is 12 square centimeters, 4.5 centimeters high, the volume of this part is () cubic centimeters

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1. The height of a conical part is 15 cm and the bottom area is 16 square cm. What is its volume in cubic cm?
2. Cast a 282.6 cubic centimeter iron block into a conical machine part with a bottom radius of 6cm, and calculate the height of the conical part? (π = 3.14)
3. Cast a 282.6 cubic centimeter iron block into a conical machine part with a bottom radius of 6cm, and calculate the height of the conical part? (π = 3.14)
4. Cast a 282.6 cubic centimeter iron block into a conical machine part with a bottom radius of 6cm, and calculate the height of the conical part? (π = 3.14)
5. There is a cylinder machine part with a height of 6.28 cm, and its side is just a square. Find the surface area of the part
6. Expand the side of a cylinder to get a square with side length of 6.28 decimeters. The volume of the cylinder is () cubic decimeters A. 2B. 2πC. 19.7192
7. The diameter of the bottom of a cylinder is 2 decimeters, and the side expansion is just a square. The volume of the cylinder is () cubic decimeters
8. The volume of a cylinder is 6.28 cubic decimeters larger than that of a cone with the same height as its bottom. It is known that the radius of the bottom of a cone is 1 decimeter, and the height of a cone is 1______ Decimeter
9. There is a machine part that is 1.5mm long and 6cm long in the figure. The scale of this figure is ()
10. The length of a machine part is 0.5cm. What is its length on a 40:1 scale drawing?
11. 1. The volume of a conical part is 76 cubic centimeters, and its height is 12 centimeters. How big is its bottom area? 2. A cone-shaped wheat pile has a bottom area of 12.56 square meters and a height of 1.5 meters. If each cubic meter of wheat weighs 700 kg, how many kg does the pile weigh? 3. A round tent, 4m in diameter and 3.5m in height How many square meters does the tent cover? How many cubic meters of space does it occupy? Except for the first question, I can do the rest, but I can't do it by 1 / 3 - I want to make an appointment - I can't do it - what should I do
12. Cast a 282.6 cubic centimeter iron block into a conical machine part with a bottom radius of 6cm, and calculate the height of the conical part? (π = 3.14)
13. Cast a 282.6 cubic centimeter iron block into a conical machine part with a bottom radius of 6cm, and calculate the height of the conical part? (π = 3.14)
14. Cast a 282.6 cubic centimeter iron block into a conical machine part with a bottom radius of 6cm, and calculate the height of the conical part? (π = 3.14)
15. The volume of a 282.6 cubic centimeter iron block is fused into a 9cm high cone-shaped machine part. How much is the bottom area of the cone-shaped part? A cylinder with a radius of 4cm and a height of 10cm is remelted into a cone with a radius of 2cm. What is its height? Answer in 20 minutes
16. For an iron machine part, the upper part is conical and the lower part is cylindrical. The area of the bottom is equal. The height of the cone is twice that of the cylinder. The volume of the cone is known to be 9.42 cubic decimeters. The total weight of the part can be calculated. (iron weight per cubic decimeter is 7.8kg)
17. A cube iron block with an edge length of 10 cm is melted and cast into a conical iron block with a bottom diameter of 20 cm. What is the height of the conical iron block? (the number obtained keeps the whole number)
18. A cylindrical part with a height of 12 cm is fused into a conical part with the same area as its bottom. The height of the conical part is ()
19. A cylindrical part with a bottom radius of 4 decimeters and a height of 6 decimeters is fused into a conical part with a bottom diameter of 4 decimeters. How many decimeters is the height of the conical part?
20. A cylindrical part with a bottom radius of 4 decimeters and a height of 6 decimeters is melted into a conical part with a bottom diameter of 12 decimeters, and the height of the cone is calculated