Actually, the "slant height" is 4, but the vertical height or "altitude" of the equilateral triangle is not 4
but anyway.....
and the volume, is the area of the triangle, times the length, so, whatever you get for the area of the triangle * 10
but anyway.....
and the volume, is the area of the triangle, times the length, so, whatever you get for the area of the triangle * 10