Difference between revisions of "2006 AMC 12A Problems/Problem 12"

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[[Category:Introductory Algebra Problems]]
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[[Category:Introductory Geometry Problems]]

Revision as of 18:06, 5 November 2006

Problem


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A number of linked rings, each 1 cm thick, are hanging on a peg. The top ring has an outisde diameter of 20 cm. The outside diameter of each of the outer rings is 1 cm less than that of the ring above it. The bottom ring has an outside diameter of 3 cm. What is the distance, in cm, from the top of the top ring to the bottom of the bottom ring?

$\mathrm{(A) \ } 171\qquad \mathrm{(B) \ } 173\qquad \mathrm{(C) \ } 182\qquad \mathrm{(D) \ } 188$$\mathrm{(E) \ }  210$

Solution

See also