## pls help me with this problem

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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
Message 1 of 32 , May 28 7:07 AM
 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?

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• 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
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:

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 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?

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