A certain type of ring has outer diameter of 58mm, an inner diameter of 40mm and thickness of 1mm. If one stacks enough rings on top of each other, it is possible to stand another ring vertically on top of the pile in such a way that the ring just touches the bottom. How many rings are in the stack when this happens?
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A certain type of ring has outer diameter of 58mm, an inner diameter of 40mm and thickness of 1mm. If one stacks enough rings on top of each other, it is possible to stand another ring vertically on top of the pile in such a way that the ring just touches the bottom. How many rings are in the stack when this happens?
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