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There are two cones with equal ground area. One cone is 4 decimeters high and 48 cubic decimeters in volume. The other cone is 3 decimeters high. What is the volume? (using proportional solution)
The volume is X Cubic decimeters
4：3=48：X
X=36
The radius of the bottom of a cone is 2 decimeters, and the height is 6 decimeters. What is the area of the bottom and the volume of the cone
3.14x2x2 = 12.56 square decimeter 12.56x6/3 = 25.12 cubic decimeter
The bottom area of a cylinder and a cone is equal. The cylinder is 3 decimeters high and its volume is 60 cubic decimeters, which is 20 cubic decimeters larger than that of a cone. What is the height of a cone?
There should be a formula
The blood of water,
The area of the bottom of the cylinder is:
60 △ 3 = 20 (square decimeter)
The volume of a cone is:
60-20 = 40 (cubic decimeter)
The height of the cone is:
40 × 3 △ 20 = 6 (decimeter)
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