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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: ( Back to comment list | You must be logged in to post comments.)
answer | Comment 29 of 32 |
The required depth of the groove is  approximately 15.92 centimeters.

Edited on June 7, 2008, 4:29 pm
  Posted by K Sengupta on 2007-05-15 04:19:42

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