A solid cylinder is a three-dimensional geometric shape with two parallel circular bases connected by a curved surface. The distance between the bases is called the height, while the radius is the distance from the center of the base to its edge. Solid cylinders are commonly found in everyday objects, such as cans and pipes. In mathematics, the volume of a solid cylinder can be calculated using the formula V = \pi r^2 h , where V is the volume, r is the radius, and h is the height. The surface area can also be determined, which includes the areas of the two circular bases and the curved surface.