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March 12th, 2014, 03:42 AM  #1 
Newbie Joined: Mar 2014 Posts: 1 Thanks: 0  Minimum diameter of a circle to fit other circles inside
Hi Is there a formula to work out the minimum diameter of a circle to fit a range of smaller circles inside it? I.e I have a pipeline which needs to be big enough (i.e have an internal diameter) to fit a varied range of smaller pipes inside it. e.g sometimes the pipe may need to house: 2 x 100mm pipes inside it or 2 x 100mm & 4 x 200mm etc.. I'd be grateful for the help. Thank you. 
March 12th, 2014, 10:50 AM  #2 
Global Moderator Joined: Dec 2006 Posts: 20,310 Thanks: 1981 
I doubt that any simple formula exists for that. For practical reasons, the interior pipes need some freedom of movement (especially if all the pipes are flexible).


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