Results 1 to 4 of 4

Math Help - Math help - Length

  1. #1
    Junior Member
    Joined
    Aug 2008
    From
    India
    Posts
    44

    Math help - Length

    A farmer has 2 grasshoppers of the same species.The coresponding parts of the grasshopper's bodies are proportional.The larger grasshopper has an 8cm body and a 1.5cm forelimb.The smaller grasshopper has a 1.2cm forelimb.How long is the body of the smaller grasshopper.
    (a)10.0cm
    (b)7.7cm
    (c)6.4cm
    (d)6.6cm
    Last edited by devi; August 28th 2008 at 11:11 PM.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Rhymes with Orange Chris L T521's Avatar
    Joined
    May 2008
    From
    Santa Cruz, CA
    Posts
    2,844
    Thanks
    3
    Quote Originally Posted by devi View Post
    A farmer has 2 grasshoppers of the same species.The coresponding parts of the grasshopper's bodies are proportional.The larger grasshopper has an 8cm body and a 1.5cm forelimb.How long is the body of the smaller grasshopper.
    (a)10.0cm
    (b)7.7cm
    (c)6.4cm
    (d)6.6cm
    We are missing one piece of information here: the length of the forelimb of the smaller grasshopper.

    I don't see how we can answer this question without that bit of information.

    --Chris
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Junior Member
    Joined
    Aug 2008
    From
    India
    Posts
    44
    Quote Originally Posted by Chris L T521 View Post
    We are missing one piece of information here: the length of the forelimb of the smaller grasshopper.

    I don't see how we can answer this question without that bit of information.

    --Chris
    Sorry.It is a mistake on my part.
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Rhymes with Orange Chris L T521's Avatar
    Joined
    May 2008
    From
    Santa Cruz, CA
    Posts
    2,844
    Thanks
    3
    Quote Originally Posted by devi View Post
    A farmer has 2 grasshoppers of the same species.The coresponding parts of the grasshopper's bodies are proportional.The larger grasshopper has an 8cm body and a 1.5cm forelimb.The smaller grasshopper has a 1.2cm forelimb.How long is the body of the smaller grasshopper.
    (a)10.0cm
    (b)7.7cm
    (c)6.4cm
    (d)6.6cm
    Set up a proportion:

    \frac{\text{body length of small grasshopper}}{\text{body length of large grasshopper}}=\frac{\text{forearm length of small grasshopper}}{\text{forearm length of large grasshopper}}

    This implies that \frac{L}{8~cm}=\frac{1.2~cm}{1.5~cm}

    Thus, L=\frac{1.2}{1.5}(8~cm)=\dots

    Can you finish this?

    --Chris
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 4
    Last Post: May 31st 2011, 03:40 AM
  2. [SOLVED] Arc Length and Chord Length
    Posted in the Trigonometry Forum
    Replies: 7
    Last Post: December 22nd 2010, 01:24 AM
  3. Length needed from a known length and angle
    Posted in the Geometry Forum
    Replies: 4
    Last Post: July 21st 2009, 06:17 AM
  4. arc length and parameterized curve length
    Posted in the Calculus Forum
    Replies: 1
    Last Post: December 5th 2008, 02:33 AM
  5. Arc length and chord length
    Posted in the Geometry Forum
    Replies: 8
    Last Post: December 19th 2007, 03:20 PM

Search Tags


/mathhelpforum @mathhelpforum