A cylinder with a base area of 10 square centimeters and a volume of 40 cubic centimeters is twice the volume of a cone of the same height. What is the volume of the cone in cubic centimeters?
一个圆柱体底面积是10平方厘米，体积是40立方厘米，是和它等高的圆锥体体积的2倍，圆锥体的体积是多少立方厘米．
<gadget id="calculator">40 / 2</gadget>
<output>20</output>

<result>20</result>