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pls help me with this problem

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  • sharada sahoo
    How many circles of radius r can be arranged around a circle of radius r so that all the circles can touch the central circle? Explore and discover exciting
    Message 1 of 32 , May 28, 2009
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      How many circles of radius r can be arranged around a circle of radius r so that all the circles can touch the central circle?


      Explore and discover exciting holidays and getaways with Yahoo! India Travel Click here!
    • Abhinav Deep
      Hi haneef, could you kindly elaborate on outer circle diameter will lie on this circumference, n . 2 . r 
      Message 32 of 32 , Aug 3, 2009
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        Hi haneef,

        could you kindly elaborate on "outer circle diameter will lie on this circumference, n . 2 . r  <  4 . pi . r" ?

        --- On Wed, 17/6/09, Haneef Mohammad <haneef0786@...> wrote:

        From: Haneef Mohammad <haneef0786@...>
        Subject: Re: [2IIM CAT Prep] pls help me with this problem
        To: ascent4cat@yahoogroups.com
        Date: Wednesday, 17 June, 2009, 6:03 AM

         

        circumference outer circles can cover = 2 pi (2r) (twice radius) = 4 . pi. r

        outer circle diameter will lie on this circumference, n . 2 . r  <  4 . pi . r

        n < 2 . pi

        n <= 6

        - Haneef.


        On Thu, May 28, 2009 at 7:37 PM, sharada sahoo <rockingpinku@ yahoo.co. in> wrote:


        How many circles of radius r can be arranged around a circle of radius r so that all the circles can touch the central circle?


        Explore and discover exciting holidays and getaways with Yahoo! India Travel Click here!



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