Volume of Solid Revolution and Mass Calculator

This code takes the outer function and inner function from you in term of the function of variable x. It rotates it about x-axis.

This code takes outer function and inner function from you in term of function of
variable x (i.e. y=f(x)).
It rotates it about x-axis (line y=0).
It calculates the volume of solid of revolution.
It plots the original functions and revolved ones.
After the calculated volume, the user can choose the density of the desired material.
and have the mass of the object.
If you want to stop function at any point, simply just press Ctrl+C