A cylinder and a cone have the same base area and volume respectively. The height of the cone is 12 cm. What is the height of the cylinder in cm?
一个圆柱和一个圆锥的底面积和体积都分别相等，圆锥的高是12cm，圆柱的高是多少cm．
<gadget id="calculator">12 / 3</gadget>
<output>4</output>

<result>4</result>