1, the radius of the cylinder bottom is 3cm, the height is 10cm, and the side area is (188.4㎝? ) with a surface area of (244.92㎝? ), the volume is (282.6㎝? ), the volume of a cone with equal bottom and equal height is (94 .2㎝? )。

2. The circumference of the cone bottom is 3 1.4dm, the height is 6dm, and the volume is (47 1dm? )。

3. The height of cylinder and cone is the same. It is known that the volume of a cylinder is 48 cubic centimeters more than the product of cones, so the volume of a cylinder is (72㎝? ), the volume of the cone is (24㎝? )。

4. The side development of the cylinder is square. The height of this cylinder is (π) times the diameter of the bottom surface.

5. Cylinders and cones have the same volume and the same bottom area. It is known that the height of cylinder is 12cm and the height of cone is (36㎝).