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Many Marbles Mystery (Posted on 2005-06-29) Difficulty: 3 of 5
Five marbles of descending sizes are placed in a conical funnel. Each marble is in contact with the adjacent marble(s). Also, each marble is in contact all around the funnel wall.

If the smallest marble has a radius of 8mm, and the largest marble has a radius of 18mm, what is the radius of the middle marble?

Bonus question, suggested by "Juggler": what's the angle of the funnel walls?

See The Solution Submitted by Old Original Oskar!    
Rating: 4.0000 (2 votes)

Comments: ( You must be logged in to post comments.)
  Subject Author Date
easy? or am i missing something?sean2005-08-23 02:34:59
SolutionSolutionBractals2005-06-30 05:03:36
SolutionJuggler's questionowl2005-06-29 21:48:14
SolutionThe basic question.Charlie2005-06-29 20:48:40
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