Results 1 to 3 of 3

Math Help - Rectangle

  1. #1
    MHF Contributor
    Joined
    Jul 2008
    From
    NYC
    Posts
    1,489

    Rectangle

    A rectangle is three times as long as it is wide. If its length and width are both decreased by 2cm, its area is decreased by 36cm^2. Find its original dimensions.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Member Last_Singularity's Avatar
    Joined
    Dec 2008
    Posts
    157
    Quote Originally Posted by magentarita View Post
    A rectangle is three times as long as it is wide. If its length and width are both decreased by 2cm, its area is decreased by 36cm^2. Find its original dimensions.
    Denote the original length to be L and its original width to be W.

    From the first sentence, you know 3W=L

    The second one tells you that (L-2)(W-2)=LW-36

    Solve the resulting two equations.
    Follow Math Help Forum on Facebook and Google+

  3. #3
    MHF Contributor
    Joined
    Jul 2008
    From
    NYC
    Posts
    1,489

    ok...

    Quote Originally Posted by Last_Singularity View Post
    Denote the original length to be L and its original width to be W.

    From the first sentence, you know 3W=L

    The second one tells you that (L-2)(W-2)=LW-36

    Solve the resulting two equations.
    Thanks. I can take it from here.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 6
    Last Post: June 2nd 2011, 04:56 PM
  2. rectangle
    Posted in the Geometry Forum
    Replies: 1
    Last Post: May 12th 2010, 05:53 PM
  3. rectangle
    Posted in the Geometry Forum
    Replies: 1
    Last Post: January 25th 2010, 12:52 PM
  4. Replies: 1
    Last Post: November 23rd 2009, 06:41 PM
  5. Fitting rectangle in a rectangle.
    Posted in the Geometry Forum
    Replies: 1
    Last Post: October 11th 2008, 06:31 PM

Search Tags


/mathhelpforum @mathhelpforum