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The Watchdog (Posted on 2004-10-28) Difficulty: 5 of 5
A watchdog is tied to the outside wall of a round building 20 feet in diameter. If the dog's chain is long enough to wind half way around the building, how large an area can the watchdog patrol?

  Submitted by Erik O.    
Rating: 3.4000 (5 votes)
Solution: (Hide)
The short answer is: PI^3 * 250 / 3 feet. A formal proof will follow...

Comments: ( You must be logged in to post comments.)
  Subject Author Date
answerK Sengupta2007-08-23 01:39:15
This Works, TooCeeAnne2006-04-27 13:09:48
re: Like, Not Quite Finallyowl2004-10-31 01:45:02
Like, Not Quite FinallyCeeAnne2004-10-30 20:17:46
re(2): FinallyLarry2004-10-30 20:01:34
re: FinallyCharlie2004-10-30 15:28:06
SolutionFinallyLarry2004-10-30 13:27:45
ReferenceRichard2004-10-30 07:21:23
Like ... please read this?CeeAnne2004-10-30 05:45:30
re(2): Pi Dog NightLarry2004-10-29 23:49:19
re: Pi Dog NightCharlie2004-10-29 17:31:38
Larry, Owl, Nikki ... LakeCeeAnne2004-10-29 16:16:39
Solutionmy approachlake2004-10-29 15:39:22
SolutionPi Dog NightLarry2004-10-29 14:07:03
re(4): Give it a gobob9092004-10-29 13:33:30
re(3): Give it a gobob9092004-10-29 13:20:40
re(2): Give it a gonikki2004-10-29 12:45:43
re: Give it a gobob9092004-10-29 12:27:43
Give it a gobob9092004-10-29 12:20:18
Very Good, NikkiCeeAnne2004-10-29 04:32:54
Why Red Zone?Richard2004-10-28 17:38:11
Solutionre(2): WD-40 please! - I think I got it nownikki2004-10-28 17:08:31
SolutionSolution?owl2004-10-28 16:48:15
re: WD-40 please! - spoilersChristian2004-10-28 16:34:21
View It This WayCeeAnne2004-10-28 15:55:26
re: WD-40 please! - spoilersCharlie2004-10-28 15:27:33
Some ThoughtsWD-40 please! - spoilersnikki2004-10-28 15:12:59
Seems SimpleCeeAnne2004-10-28 14:58:57
Large AreaCeeAnne2004-10-28 14:38:31
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