This question is simple. If you cut a conical cake in half along the height perpendicular to the bottom, you will add two triangles. The area of both triangles is 24cm2, so one triangle is 12cm2. 12 times 2÷6 (the height of the triangle) equals 4CM, and the fourth is the diameter of the bottom of the cone. (4÷2) times 3. 14 squared equals 12.56cm2, which is the volume of the cone.