A cylinder and a cone have the same base area and the same volume. The height of the cylinder is 18 cm, what is the height of the cone in cm.
一个圆柱和一个圆锥，底面积相等，体积也相等．圆柱的高是18厘米，圆锥的高是多少厘米．
<gadget id="calculator">18 * 3</gadget>
<output>54</output>

<result>54</result>