Answer: (a) A cylindrical drill with radius is used to bore a hole through the center of
Chapter 15, Problem 28(choose chapter or problem)
(a) A cylindrical drill with radius is used to bore a hole through the center of a sphere of radius . Find the volume of the ring-shaped solid that remains. (b) Express the volume in part (a) in terms of the height of the ring. Notice that the volume depends only on , not on or .
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