cylinder and a cone have the same volume and the same base area, and the height of the cylinder is 6 cm, what is the height of the cone in cm?
一个圆柱和一个圆锥体积相等，底面积相等，圆柱的高是6cm，那么圆锥的高是多少cm．
<gadget id="calculator">6 * 3</gadget>
<output>18</output>

<result>18</result>