Question 1084401
A roll of paper has an external diameter of 3' and internal diameter of 8".  The paper is .005" thick.  Determine length of paper. 

Answer given: 16130 ft. 
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OD - ID = 36 - 8 = 28 inches --> r = 14 inches
14/0.005 = 2800 turns.
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Average diameter = (36+8)/2 = 22 inches
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22*pi*2800 = 193522 inches
= 16127 feet