The volume ratio of a cylinder and a cone is 2:3, and the ratio of the radius of the bottom surface is 1:4. It is known that the height of the cylinder is 16 cm, and how many centimeters is the height of the cone.
一个圆柱和一个圆锥体积比是2：3，底面半径的比是1：4，已知圆柱高16厘米，圆锥高多少厘米．
<gadget id="calculator">16 / 32</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(1/2) * 9</gadget>
<output>9/2 = around 4.5</output>

<result>9/2 = around 4.5</result>