A cylindrical drill with radius r1 is used to bore a hole throught the center of a sphere of radius r2. Find the volume of the ring shaped solid that remains.
The Attempt at a Solution
i know that the boundaries are:
for theta: 0 to 2*pi
for r: r1 to r2
i just dont know the equation to use in the double integral.. the equation of the cylinder is x^2+y^2= r1^2 i know that much.