A cylindrical iron block with a base radius of 8 cm and a height of 20 cm is cast into a cone whose base is the same as the cylinder. What is the height of the cone in centimeters.
一个底面半径8厘米，高20厘米的圆柱形铁块，现在要把它铸造成一个底面与圆柱相同的圆锥．这个圆锥的高是多少厘米．
<gadget id="calculator">20 * 3</gadget>
<output>60</output>

<result>60</result>