If the section of a cone passing through an axis is an equilateral triangle, then the ratio of its side area to its bottom area is () A. 3:2B. 3:1C. 5:3D. 2:1

If the section of a cone passing through an axis is an equilateral triangle, then the ratio of its side area to its bottom area is () A. 3:2B. 3:1C. 5:3D. 2:1

Let the radius of the circle at the bottom of the cone be r, | s-bottom = π R2, s-side = 12.2r.2 π r = 2 π R2, | s-side: s-bottom = 2 π R2: π R2 = 2:1