(Solution Download) If the curve z x2 in the xz plane is

If the curve z = x2 in the xz-plane is revolved about the z-axis the resulting surface has equation z = x2 + y2, obtained as a result of replacing x by ?x2 + y2. If y = 2x2 in the xy-plane is revolved about the y-axis, what is the equation of the resulting surface?