What is volume by disk method?

The volume by disk method is a technique used to calculate the volume of a three-dimensional object, such as a solid of revolution, by dividing it into thin disks. For example, if you want to find the volume of a cone, you can divide it into many thin disks, each of which is essentially a small, solid circle. By adding up the volumes of all these disks, you can get an approximation of the total volume of the cone. As the number of disks increases, the approximation becomes more accurate. This method can be used for any object that can be split into disks, including cylinders, spheres, and more complex shapes.