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 The groove around the moon (Posted on 2002-05-06)
Imagine you would have to put a rope around the moon. Since the moon is 1,738,000 metres in diameter, this is a hard task. Finally you have managed to get the rope around the moon but... it is one meter short.

You decide to dig a groove all around the moon, so that the shorter rope suffices. How deep must this groove be? (Assume the Moon to be a perfect sphere.)

 See The Solution Submitted by charl Rating: 2.9167 (12 votes)

 Subject Author Date A different (and simple) approach JayDeeKay 2015-06-05 18:08:30 re(2): answer K Sengupta 2008-06-07 16:32:10 re: answer Dej Mar 2008-06-07 12:38:51 answer K Sengupta 2007-05-15 04:19:42 re: Zero Option Solution owl 2004-10-28 12:42:37 Zero Option Solution CeeAnne 2004-10-27 15:28:24 Differences bob909 2004-10-27 09:44:21 re: dig it prashant 2004-03-29 07:52:16 dig it prashant 2004-03-29 07:39:08 Solution Antonio 2003-08-24 03:16:48 No Subject Lucifer 2003-03-01 09:12:26 No Subject danny 2002-11-12 17:42:33 You win Mike 2002-07-24 22:53:55 re: Got to be wrong! TomM 2002-07-24 07:34:23 Got to be wrong! Mike 2002-07-24 05:25:51 My Answer Tom 2002-05-09 12:47:14 thanks John Ryder 2002-05-09 08:04:52 Well... levik 2002-05-08 20:22:10 I understand what you're saying...but John Ryder 2002-05-08 13:08:49 Look at it this way levik 2002-05-08 11:34:48 I don't understand the Solution John Ryder 2002-05-08 07:11:38 Solution Stuff N. Things 2002-05-07 17:55:53 ring around the WHAT? Dan Dise 2002-05-07 13:45:41 But.... John 2002-05-07 12:28:11 solution? John Ryder 2002-05-07 11:45:39 But only... John 2002-05-07 10:43:32 Interesting observation Whiskey Pete 2002-05-07 09:29:50 Hmmm... Tim 2002-05-07 08:59:17 Solution Terry 2002-05-07 08:58:34 David Rowley Correct toferc 2002-05-07 07:37:16 Solution? David Rowley 2002-05-07 07:17:42 1 meter?? kevin 2002-05-07 07:07:13

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