Thank you! But

来源: yma16 于 2004-01-19 06:16:00 [] [旧帖] [给我悄悄话] 阅读数 : (222 bytes)

I made a mistake. 1/cos(30) is right. In order to fully answer the question, we need to show all other ways for the coin slipping through the hole, the length has to be


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• 回复：Thank you! But -atom9- ♀ 给 atom9 发送悄悄话 (433 bytes) () 01/19/2004 postreply 13:33:00

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