Here is another method for finding the volume of a solid of revolution.It’s called the method of cylindrical shells or the shell method.For many problems,it’s easier to apply than the disk method and washer method.So,what is a shell?A shell is a solid bounded by two concentric right circular cylinders(Figure 1).Some people also call it as a cylindrical shell.Shell method is always applied to a solid ob- Here is another method for finding the volume of a solid of revolution. It’s called the method of cylindrical shells or the shell method. For many problems, it’s easier to apply than the disk method and washer method. So, what is a shell? A shell is a solid bounded by two concentric right circular cylinders (Figure 1) .Some people also call it as a cylindrical shell.Shell method is always applied to a solid ob-