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'Impossible' Solid's Volume (Posted on 2006-11-04) Difficulty: 4 of 5
For background please use the two links which are the bold and blue words.

A solid whose plan view and front and side elevations resembled a multiplication symbol (x) bounded by a circle may be viewed here.

It is the third on that page.

The object can be created by imposing 3 cylinders on a cube in each of the x, y and z dimensions.

If the edges of the cube are of unit length, What is the volume of this object?

How mundane (as being simple) a solution can we get?

See The Solution Submitted by brianjn    
Rating: 4.0000 (3 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)
Nothing definite | Comment 3 of 12 |
The cube from which this can be made has edges of 1 unit.
If I consider this to be 2*r then the volume is 8*r^3.

For a cylinder cut from such a cube (∏ r²h), using the same idea I would have ∏r² * 2r  or 2∏r³.

And a sphere would 4/3 * ∏r³.

The volume of my object is therefore somewhere between the volume of the cylinder and the sphere.

Interesting, I can create ∏ by writing the code &#8719 in the CB and copy and paste it to here, but if I write the code here it doesn't translate.   ????

Edited on November 4, 2006, 6:39 pm
  Posted by brianjn on 2006-11-04 18:24:12

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