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Using the Shell method to find the volume of a solid

  1. Feb 5, 2012 #1
    Use the shell method to find the volume of a solid generated by revolving the region bounded by the given curves and lines about the x-axis.

    x=2√y
    x=-2y
    y=1

    So I drew a graph and then using the equation v=∫2πrh

    and I got the following

    v=∫(from 0 to 2) 2π(y-1)((2√y)-(-2y))

    but this is wrong. any suggestions?
     
  2. jcsd
  3. Feb 6, 2012 #2

    vela

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    Why do you have (y-1) for the radius? And why are your limits 0 to 2?
     
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