Results 1 to 6 of 6

Math Help - Surface Area of Solid of Revolution

  1. #1
    Member
    Joined
    Nov 2008
    Posts
    76

    Surface Area of Solid of Revolution

    Find the surface area of the solid of revolution obtained by rotating the curve from y= 2 to y= 5 about the x-axis.
    Attached Thumbnails Attached Thumbnails Surface Area of Solid of Revolution-problem-18.jpg  
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Member
    Joined
    Nov 2008
    Posts
    76
    I keep getting 580.3030543, but apparently that is not the right answer.
    Follow Math Help Forum on Facebook and Google+

  3. #3
    MHF Contributor
    Joined
    Oct 2005
    From
    Earth
    Posts
    1,599
    Since you have attempted the problem in its entirety, it's a good idea to post your work. That way it's easier for those who can help to spot your error and to see what you know/don't know.
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Member
    Joined
    Nov 2008
    Posts
    76
    I used the formula:

    2*pi*y*sqrt(1+(dx/dy)^2)dy

    From that, I got:
    Attached Thumbnails Attached Thumbnails Surface Area of Solid of Revolution-problem-18.jpg  
    Follow Math Help Forum on Facebook and Google+

  5. #5
    Member
    Joined
    Nov 2008
    Posts
    76
    I know I plugged in the numbers correctly, because I checked it carefully about four times.
    Follow Math Help Forum on Facebook and Google+

  6. #6
    Member
    Joined
    Nov 2008
    Posts
    76
    Bump. Anyone? I can't tell if I'm integrating properly.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Surface Area of a Revolution
    Posted in the Calculus Forum
    Replies: 2
    Last Post: April 30th 2011, 11:18 AM
  2. Area of Surface of Revolution
    Posted in the Calculus Forum
    Replies: 6
    Last Post: February 7th 2010, 01:38 PM
  3. Area of a Surface of Revolution
    Posted in the Calculus Forum
    Replies: 2
    Last Post: March 15th 2009, 11:51 AM
  4. The area of surface of revolution
    Posted in the Calculus Forum
    Replies: 2
    Last Post: November 10th 2008, 07:27 AM
  5. Area of a surface of revolution
    Posted in the Calculus Forum
    Replies: 5
    Last Post: March 20th 2008, 03:55 PM

Search Tags


/mathhelpforum @mathhelpforum