For example, how to find the volume of the body of revolution generated by the rotation of the ellipse 4 * (the square of x) + 9 * (the square of Y) = 1 around the x-axis and y-axis respectively?

For example, how to find the volume of the body of revolution generated by the rotation of the ellipse 4 * (the square of x) + 9 * (the square of Y) = 1 around the x-axis and y-axis respectively?

Let a, B and C be the radii of the body of revolution
Then the volume of the body of revolution produced by rotation around x-axis and y-axis is respectively
V = 4 / 3 * Wu * ABC = 2 / 27 * Wu, 1 / 9 * Wu