Question: What volume of material is removed from a solid sphere of radius 2r by drilling a hole of radius r through the center? Verify that

What volume of material is removed from a solid sphere of

What volume of material is removed from a solid sphere of radius 2r by drilling a hole of radius r through the center? Verify that the "shell" and "disc" method give the same result. 2. Find the volume of a solid whose cross section, perpendicular to the x - axis, has area given by x3 for each x in the interval a

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