The cylinder and the cone have the same volume and the same base area. The height of the cylinder is 6 cm. What is the height of the cone in cm?
圆柱和圆锥的体积相等，底面积也相等，圆柱的高是6厘米，圆锥的高是多少厘米．
<gadget id="calculator">6 * 3</gadget>
<output>18</output>

<result>18</result>