Hi guys , i'm new here and i have a question , how did they found the (r) in this problem? r means radius and radius is half of diameter !! what does 12 has to do with it?
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No Eric , this is a general question !! but if you think it doesn't blong in here , do ithi Amir,
Is this a Homework assignment, if yes, I will move it to the Homework section.
Eric