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The Hat and the River (Posted on 2003-05-05) Difficulty: 4 of 5
Bob is having a nice camping/fishing trip along a river. He leaves his campsite early in the morning, and gets on his boat, heading full throttle upstream.

After going for exactly one mile, his hat flips off of his head, and starts floating downstream. Bob doesn't realize that his hat has fallen off for five minutes, but then he notices that it's missing, and turns full throttle downstream.

He finally catches the hat at exactly the same spot as he camped that morning. The question is, how fast was the water traveling?

(Assume that he travels the same speed the entire time and that there is no turn around time.)

See The Solution Submitted by Jonathan Waltz    
Rating: 2.0000 (4 votes)

Comments: ( You must be logged in to post comments.)
  Subject Author Date
SolutionPuzzle SolutionK Sengupta2008-11-17 23:52:07
AnswerK Sengupta2008-11-16 00:11:59
Generalization of three equations, three unknownsKenny M2005-12-10 13:42:32
All your answers are incorrect:michael2005-12-09 17:47:49
re: Laborious solutionMichael Cottle2004-12-29 05:51:51
SolutionLaborious solutionLarry2004-12-28 22:47:51
re: Water speed???? re: General Shortcut FormulaHugo2004-12-28 18:24:12
QuestionWater speed???? re: General Shortcut FormulaMichael Cottle2004-12-28 04:55:29
???lesa2003-09-05 01:36:21
re(3): General Shortcut FormulaVinodhan Selvarajalu2003-05-08 02:44:58
Solutionspinoza2003-05-08 00:56:08
re(2): General Shortcut FormulaJayaram S2003-05-08 00:15:54
re: General Shortcut FormulaVinodhan Selvarajalu2003-05-07 21:16:07
re: solutionVinodhan Selvarajalu2003-05-07 21:12:18
Some ThoughtsMy Guess (first time user)Nicole2003-05-07 06:50:31
SolutionGeneral Shortcut FormulaJayaram S2003-05-07 00:14:54
re: hmmm.. got itRyan2003-05-06 18:58:16
re: I remember this oneRyan2003-05-06 18:57:16
re: Multiple Solutions?Ryan2003-05-06 18:48:47
re: solutionBrian Smith2003-05-06 08:12:18
hmmm.. got itJon2003-05-06 08:01:46
SolutionsolutionCharlie2003-05-05 16:24:12
I remember this oneBrian Smith2003-05-05 10:18:10
Some ThoughtsMultiple Solutions?DJ2003-05-05 10:08:46
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