+30 The two bases of a cylinder are two parallel cross sections of a sphere. We know the radius of the sphere is 3 and the height of the cylinder is 4 Find the volume of the cylinder.
[asy] size(4cm); import three; currentprojection=orthographic(0,2,0.2); triple A,B,C,D,P,Q; A=(0.8,0,0.6); B=(0,0.8,0.6); C=(-0.8,0,0.6); D=(0,-0.8,0.6); P=(0,0,1); Q=-P; draw(A..B..C); draw(C..D..A,dashed); A=(0.8,0,-0.6); B=(0,0.8,-0.6); C=(-0.8,0,-0.6); D=(0,-0.8,-0.6); draw(A..B..C); draw(C..D..A,dashed); draw(A--A+(0,0,1.2)); draw(C--C+(0,0,1.2)); A=(1,0,0); C=(-1,0,0); draw(A..P..C..Q..A); dot(origin); [/asy]
(sorry idk how to put the picture)
