A cylinder and a cone have the same volume and the same base area. The height of the cylinder is 3 cm, what is the height of the cone in cm?
一个圆柱体和圆锥体的体积相等，底面积相等．圆柱高3厘米，圆锥高多少厘米厘米．
<gadget id="calculator">3 * 3</gadget>
<output>9</output>

<result>9</result>