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Homework Help: Perplexing Problem

  1. Nov 27, 2006 #1
    A cylindrical hole is put through a ball of radius a (>b) to form a ring. I am trying to find the outer surface area of the ring. I know i am supposed to parametrise the ring in some way, as we are learning about parametrizing surfaces. But I don't really know how to go about solving this problem.
  2. jcsd
  3. Nov 27, 2006 #2
    oh the radius of the cylindrical hole is 'b'

    (i already know the numerical answer, i just am having problems starting the problem)
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