perplexus.info :: Geometry : Many Marbles Mystery

Many Marbles Mystery (Posted on 2005-06-29)

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
Puzzle Answer	K Sengupta	2022-03-20 02:40:18
easy? or am i missing something?	sean	2005-08-23 02:34:59
Solution	Bractals	2005-06-30 05:03:36
Juggler's question	owl	2005-06-29 21:48:14
The basic question.	Charlie	2005-06-29 20:48:40

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