Locate the Centroid of the given volumes of solid of revolution.

1. A solid cone of base radius r and height h. 2. The solid generated by revolving the region below the graph of flx)=u'x, from 1:20 to 1121 about xaxis. Locate the centroid of the solid generated by revolving about the xaxis the first quadrant region bounded by the ellipse 52x2 + day: = o3b2 and the coordinate axis