Find the volume of the solid of revolution generated by rotating the graph of r = 41ny about the r-axis between r = 0 and r = 8.The mlume of a solid can often be deter mined by integration even when the cross section of the solid is not necessarily.r a circle. In the following gure .2 the base is the circle 32 + y2 = l and the crosssection perpendicular to the y axis is a square. Set up a denite integral expressing the volume, V, of the solid. Find the volume. V. of the solid obtained by rotating the region bounded by = c=2, 1 = 4, 7 =0