hi! I'm new in here, and I was wondering if I could get some help in a couple of math problems I have difficulties with:

1. A funnel of specific volume has the shape of a right circular cone. Determine the reason from the height to the radius of the base so that the minimal quantity of material is used in it's construction.

2. The transversal section of a drinking trough has the shape of a reversed isósceles triangle. If the length of a side is 15 inches, determine the size of the angle shaped by two sides that provides the drinking trough it’s maximum capacity. (here's the draw that came with the problem: http://i610.photobucket.com/albums/t...l777/draww.jpg)

Thank you!!!