Can someone please explain it to me why my answer is wrong ASAP?!!! The question is asking find the volume of the solid generated when R shaded region is revolved about the given line. Y=12-sqrt x, y= 12, x= 144; about y = 12. The volume of the solid obtained by revolving region about y= 12 is 13068 pi. My answer is wrong. What is the correct answer should be? This is Volume by Slicing

a volume of the solid generated when R (shaded region) is revolved about the given line. ~~~.y=12,x=144-, abouty=12