A circular piece of paper with a radius of [[$ 134 \;\text{mm} $]] is cut into four identical parts along two diameters perpendicular to each other. Each section is then folded into a straight ice cream cone cover paper (without a lid) shaped like a circular cone. The assignment does not take into account the bending allowance of the joints, etc. (Source: Entrance examination assignment for engineering education, spring 2003)

Take a picture of your solution and return it to the submission folder.

a) Draw as much detail as possible on a single sheet of protective paper at a scale of [[$ 1: 2 $]] before folding.

b) What is the radius of the circle at the top of the cone?

Answer: The radius of the circle at the top of the cone is mm.

c) What is the volume of the cone in cubic millimeters?

Answer: The volume of the cone is mm[[$ ^2 $]].