# Find the Minimum Volume of cone, answer does not make sense

1. Mar 22, 2011

### Brown Arrow

1. The problem statement, all variables and given/known data

Find the Dimensions of the right circular cone of minimum volume which can be circumscribed about a sphere of radius 8 inches.

2. Relevant equations

N/A

3. The attempt at a solution
So this is my try, i did the question to find the minimum volume of the cone,

For Larger Size: http://i54.tinypic.com/29yqyiw.jpg
As you can see the minimum value is when h=0 , thus volume is equal to 0, it makes sense the minimum volume would be 0, but i think i did the question wrong, can you tell me where i've gone wrong.

2. Mar 22, 2011

### LCKurtz

Your picture shows a cone that is inscribed inside a sphere, not circumscribed outside as the problem asks.

3. Mar 22, 2011

### Brown Arrow

so is it suppose to be like this then i try to minimize the volume of the cone,

sorry i didn't get what it meant mean circumscribed , i though it would be inside

4. Mar 22, 2011