A playground merry-go-round has a disk-shaped platform that rotateswith negligible friction about a vertical axis. The disk has a massof 200 kg and a radius of 1.9 m. A 34- kg child rides at the centerof the merry-go-round while a playmate sets it turning at 0.40rpm. If the child then walks along a radius to the outer edge of thedisk, how fast will the disk be turning (in rpm)?