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 What's wrong with CDs? (Posted on 2005-03-30)

The diameter of a long playing vinyl record is 12 inches. The unused center has a diameter of 4 inches, and there is a smooth outer edge that is 1 inch wide. If there are 91 grooves to the inch, how far does the needle travel within the groove during playback of the record?

 See The Solution Submitted by Erik O. Rating: 4.0000 (1 votes)

 Subject Author Date Puzzle Answer K Sengupta 2022-07-23 01:01:21 THE CORRECT SOLUTION! kris 2005-04-04 16:45:49 Two similarities TomM 2005-04-02 00:40:09 re: Simpler Solution Charlie 2005-03-31 19:38:11 Simpler Solution CeeAnne 2005-03-31 19:26:45 re(2): Solution Dustin 2005-03-31 01:04:26 re: Solution asdfjfaadslkfj 2005-03-30 23:27:58 An Aside--trivia Charlie 2005-03-30 15:53:06 re: Solution Charlie 2005-03-30 15:25:19 Solution e.g. 2005-03-30 14:43:32 Non-Calculus Approximation--spoiler Charlie 2005-03-30 14:14:46

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