Imagine a cutaway ball in a cube. It turns out a circle inscribed in a square. The center of the circle coincides with the center of the cube, and, therefore, the radius of the circle, equal to 10 cm, is equal to half of the side of the square. From this it follows that the side of the square and the cube is 20 cm. Let’s use the formula for calculating the volume of a cube. V = a * b * c, where a = b = c = 20 cm V = 20 ^ 3 = 8000 (cm ^ 3).
One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.