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 The Watchdog (Posted on 2004-10-28)
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...

 Subject Author Date answer K Sengupta 2007-08-23 01:39:15 This Works, Too CeeAnne 2006-04-27 13:09:48 re: Like, Not Quite Finally owl 2004-10-31 01:45:02 Like, Not Quite Finally CeeAnne 2004-10-30 20:17:46 re(2): Finally Larry 2004-10-30 20:01:34 re: Finally Charlie 2004-10-30 15:28:06 Finally Larry 2004-10-30 13:27:45 Reference Richard 2004-10-30 07:21:23 Like ... please read this? CeeAnne 2004-10-30 05:45:30 re(2): Pi Dog Night Larry 2004-10-29 23:49:19 re: Pi Dog Night Charlie 2004-10-29 17:31:38 Larry, Owl, Nikki ... Lake CeeAnne 2004-10-29 16:16:39 my approach lake 2004-10-29 15:39:22 Pi Dog Night Larry 2004-10-29 14:07:03 re(4): Give it a go bob909 2004-10-29 13:33:30 re(3): Give it a go bob909 2004-10-29 13:20:40 re(2): Give it a go nikki 2004-10-29 12:45:43 re: Give it a go bob909 2004-10-29 12:27:43 Give it a go bob909 2004-10-29 12:20:18 Very Good, Nikki CeeAnne 2004-10-29 04:32:54 Why Red Zone? Richard 2004-10-28 17:38:11 re(2): WD-40 please! - I think I got it now nikki 2004-10-28 17:08:31 Solution? owl 2004-10-28 16:48:15 re: WD-40 please! - spoilers Christian 2004-10-28 16:34:21 View It This Way CeeAnne 2004-10-28 15:55:26 re: WD-40 please! - spoilers Charlie 2004-10-28 15:27:33 WD-40 please! - spoilers nikki 2004-10-28 15:12:59 Seems Simple CeeAnne 2004-10-28 14:58:57 Large Area CeeAnne 2004-10-28 14:38:31

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