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Circle, Circle, Sphere! (Posted on 2004-08-26) Difficulty: 4 of 5
A circle of radius 2 is contained in the plane y=3.

A circle of radius 4 is contained in the plane y=7.

Both circles lie on the surface of a sphere.

What is the radius of the sphere?

See The Solution Submitted by SilverKnight    
Rating: 2.6667 (3 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)
re(2): No Subject | Comment 4 of 8 |
(In reply to re: No Subject by Charlie)

You're right Charlie - a careless error on my part.  I should check the reasonableness of my answer.  Has to be greater than 4!

Formula still works though.  Same answer as you.


  Posted by bernie on 2004-08-26 15:17:07
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