He said that if cubes are cast into a cone, it means that their volume remains the same. (Melting and casting is to melt iron into another shape, so the volume remains the same. ) We only need to calculate the volume of the cone *3/ the bottom area. Because the volume of a cube = the volume of a cone, and he told us that the side length of a cube is 10cm, let's first calculate the volume of a cube,10 *10 =1000 cubic centimeter, which is the volume of a cube and the volume of a cone. Then use the volume of the cone (1000)*3 to calculate a cylinder with the same height as the cone. Because the volume of the cylinder = the height of the bottom area *, we have to calculate the height. The topic is that the diameter of the ground is 20cm, so we use this condition to calculate the bottom area. (20/2) * (20/2) * 3.14 = 314 cm2, even if the bottom area is calculated, then use 1000*3=3000 to calculate the volume of a cylinder with the same height as this cone, and finally use 3000/3.
Comprehensive formula =10 *10 *10/[3.14 * (20/2) * (20/2)/3]
= 1000/[3. 14* 100/3]
= 10 (cm)
Pure hands, give a reward! ! !