What is the shell formula?
What is the shell formula? The shell method relies on an easy geometrical formula. A very thin cylindrical shell can be approximated by a very thin rectangular solid. Thus, the volume of the shell is approximated by the volume of the prism, which is L x W x H = (2 π r) x h x dr = 2πrh dr. What is the difference between washer and shell method? The Washer Method is used when the rectangle sweeps out a solid that is similar to a CD (hole in the middle). And finally, the Shell Method is used when the...