What is a solid that has a rectangle as it's top view and side elevation and a circle as a end elevation?

The solid described is a cylindrical shape with a rectangular prism section. In this case, the rectangle represents the top view and side elevation, indicating that the cylinder has a rectangular cross-section along its length. The circular end elevation suggests that the solid has circular ends, which is characteristic of a cylinder. This combination results in a shape that may be a cylinder with rectangular sides or a more complex solid with cylindrical features.