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Homework Help: Surface Area of Solid Cylinder

  1. Sep 23, 2009 #1
    1. The problem statement, all variables and given/known data

    A solid cylinder with a radius of 5.0 cm and a length of 10. cm is cut in half lengthwise. What is the surface area of one of the two resulting objects?

    2. Relevant equations

    SA = 2(pi)(r2) + L(pi)(r2)

    3. The attempt at a solution

    Is that the correct formula? If it is I am getting 863 in^3 as an answer :(
  2. jcsd
  3. Sep 23, 2009 #2


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    Homework Helper

    the surface area of half the solid cylinder will be the sum of contributions from:
    2 x end semi-cricles
    rectangle of cut surface
    rectangle of one half of cylinder "unrolled"

    also why change from cm to in?
  4. Sep 24, 2009 #3


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    Science Advisor
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    Gold Member

    And area isn't measured in units3.
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