Results 1 to 3 of 3

Math Help - surface area and formulas

  1. #1
    Newbie
    Joined
    Jun 2007
    Posts
    2

    surface area and formulas

    A sculptor works with large wooden cuboids (rectangular prisms), cuts them into three smaller cuboids and then paints them black, white and grey. The volume of the black cuboid is always twice the volume of the white one and the volume of the white cuboid is always twice the volume of the grey one.

    The cuts are always parallel to the face marked with w and h. We will always denote the surface areas of the separated cuboids by A1 (black) , A2 (white) and A3 (grey).


    Q: The sculptor decides she would like to have A1:A3 = 4:3. If this is to be the case, find the formula linkin l,w and h and give an example of the dimensions of a cuboid, before it is cut, for which this will work.

    thank you heaps
    Follow Math Help Forum on Facebook and Google+

  2. #2
    is up to his old tricks again! Jhevon's Avatar
    Joined
    Feb 2007
    From
    New York, USA
    Posts
    11,663
    Thanks
    3
    Quote Originally Posted by helpmaths View Post
    A sculptor works with large wooden cuboids (rectangular prisms), cuts them into three smaller cuboids and then paints them black, white and grey. The volume of the black cuboid is always twice the volume of the white one and the volume of the white cuboid is always twice the volume of the grey one.

    The cuts are always parallel to the face marked with w and h. We will always denote the surface areas of the separated cuboids by A1 (black) , A2 (white) and A3 (grey).


    Q: The sculptor decides she would like to have A1:A3 = 4:3. If this is to be the case, find the formula linkin l,w and h and give an example of the dimensions of a cuboid, before it is cut, for which this will work.

    thank you heaps
    this question was asked by another user and was answered here
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Newbie
    Joined
    Jun 2007
    Posts
    2
    yes. i have looked at that answer.but i still don't quite get it. i would really appreciate if someone could assist me with this maths problem.
    thank you
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Calculate the surface area of the surface
    Posted in the Calculus Forum
    Replies: 2
    Last Post: June 26th 2009, 05:03 AM
  2. Surface Area and formulas
    Posted in the Geometry Forum
    Replies: 1
    Last Post: May 12th 2009, 08:10 PM
  3. Help finding surface area of a surface
    Posted in the Calculus Forum
    Replies: 1
    Last Post: October 3rd 2008, 05:11 PM
  4. Volume, Surface Area, and Lateral Surface Area
    Posted in the Geometry Forum
    Replies: 1
    Last Post: April 15th 2008, 12:40 AM
  5. Formulas and finding surface areas.
    Posted in the Geometry Forum
    Replies: 5
    Last Post: May 24th 2006, 02:13 PM

Search Tags


/mathhelpforum @mathhelpforum