All about flooble | fun stuff | Get a free chatterbox | Free JavaScript | Avatars    
perplexus dot info

Home > Shapes
The groove around the moon (Posted on 2002-05-06) Difficulty: 3 of 5
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)

Comments: ( You must be logged in to post comments.)
  Subject Author Date
SolutionA different (and simple) approachJayDeeKay2015-06-05 18:08:30
re(2): answerK Sengupta2008-06-07 16:32:10
re: answerDej Mar2008-06-07 12:38:51
answerK Sengupta2007-05-15 04:19:42
re: Zero Option Solutionowl2004-10-28 12:42:37
SolutionZero Option SolutionCeeAnne2004-10-27 15:28:24
Differencesbob9092004-10-27 09:44:21
re: dig itprashant2004-03-29 07:52:16
dig itprashant2004-03-29 07:39:08
SolutionSolutionAntonio2003-08-24 03:16:48
No SubjectLucifer2003-03-01 09:12:26
SolutionNo Subjectdanny2002-11-12 17:42:33
You winMike2002-07-24 22:53:55
re: Got to be wrong!TomM2002-07-24 07:34:23
Got to be wrong!Mike2002-07-24 05:25:51
My AnswerTom2002-05-09 12:47:14
thanksJohn Ryder2002-05-09 08:04:52
Well...levik2002-05-08 20:22:10
I understand what you're saying...butJohn Ryder2002-05-08 13:08:49
Look at it this waylevik2002-05-08 11:34:48
I don't understand the SolutionJohn Ryder2002-05-08 07:11:38
SolutionStuff N. Things2002-05-07 17:55:53
ring around the WHAT?Dan Dise2002-05-07 13:45:41
But....John2002-05-07 12:28:11
solution?John Ryder2002-05-07 11:45:39
But only...John2002-05-07 10:43:32
Interesting observationWhiskey Pete2002-05-07 09:29:50
Hmmm...Tim2002-05-07 08:59:17
SolutionTerry2002-05-07 08:58:34
David Rowley Correcttoferc2002-05-07 07:37:16
Solution?David Rowley2002-05-07 07:17:42
1 meter??kevin2002-05-07 07:07:13
Please log in:
Login:
Password:
Remember me:
Sign up! | Forgot password


Search:
Search body:
Forums (0)
Newest Problems
Random Problem
FAQ | About This Site
Site Statistics
New Comments (9)
Unsolved Problems
Top Rated Problems
This month's top
Most Commented On

Chatterbox:
Copyright © 2002 - 2017 by Animus Pactum Consulting. All rights reserved. Privacy Information