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

<result>18</result>