Sat2 og
问题描述：
Sat2 og
the radius of the base of a right circular cone is 6 and the radius of a parallel cross section is 4 .If the distance between the base and the cross section is 8 .what is the height of the cone?a)11 b)40/3 c)16 d)20 e)24
答
翻译：圆锥体的底面半径为6,一个平行于底面的截面半径为4,这个截面与地面的距离为8,这个圆锥体的高是多少?
设圆锥体的高度为x,根据两个椎体相似得到方程：6/4=x/(x-8)
解得x=24