Results 1 to 4 of 4

Math Help - need a starting point urgently.

  1. #1
    Newbie
    Joined
    Jan 2009
    From
    Hull, England
    Posts
    2

    Exclamation need a starting point urgently.

    A manufacturer is to design and make plastic drinking cups in the form of an open cylinder and decides that the maximum capacity of the cups must be 400cm^3. clearly the manufacturer wishes to keep costs to a minimum. what dimensions for the cylinder would you suggest?

    any help would be appreciated on this i have to give a presentation on it on thursday and have been struggling with it for weeks. i don't even know where to start from all i've got is the formula for the area of a cylinder.

    i've tried a trial and error but it's not really what they're looking for and i don't think i was any closer to the answer anyway.

    Follow Math Help Forum on Facebook and Google+

  2. #2
    Junior Member
    Joined
    Jan 2009
    Posts
    38
    A manufacturer is to design and make plastic drinking cups in the form of an open cylinder and decides that the maximum capacity of the cups must be 400cm^3. clearly the manufacturer wishes to keep costs to a minimum. what dimensions for the cylinder would you suggest?



    here we can use maxima/minima concept
    volume=400cu.cm (constant)
    you have to minimise the surface area S =[2*(Pi)*RH] +[Pi*R^2]
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Newbie
    Joined
    Jan 2009
    From
    Hull, England
    Posts
    2
    ok i'm probably being a MAJOR retard here but i've either completely forgotten how to do that or i've never learnt it. how on earth did i get to university.
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Junior Member
    Joined
    Jan 2009
    Posts
    38
    answer-
    when radius of base R = height H = {400/∏}^1/3
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. starting point for this integral?
    Posted in the Calculus Forum
    Replies: 1
    Last Post: September 23rd 2011, 10:58 AM
  2. Replies: 1
    Last Post: March 5th 2010, 11:46 AM
  3. Starting point for Riemann sum, Integral proof?
    Posted in the Differential Geometry Forum
    Replies: 8
    Last Post: February 11th 2010, 06:10 AM
  4. I need a starting point for this problem!
    Posted in the Algebra Forum
    Replies: 1
    Last Post: February 6th 2010, 07:10 AM
  5. Mathematics...a starting point?
    Posted in the Math Topics Forum
    Replies: 4
    Last Post: November 19th 2008, 06:47 PM

Search Tags


/mathhelpforum @mathhelpforum