The line `y=0` just means the `x`-axis.

From the diagram, we can see that the limits of the bounded area are x = 0 and x = 2.

The volume generated is:

`{: ("Vol",=pi int_a^b y^2 dx), (,=pi int_0^2 (2x-x^2)^2 dx), (,=pi int_0^2 (4x^2-4x^3+x^4) dx), (,=pi [(4x^3)/(3) - (4x^4)/(4) + (x^5)/(5)]_0^2), (,=pi [32/3 - 16 + 32/5] - pi[0]), (,=(16)/(15)pi\ text[units]^3), (,~~3.351\ text[units]^3) :}`