A cylinder is 30cm**3 larger than a cone with the same base and height. What is the volume of the cone?
一个圆柱比与它等底等高的圆锥体积多30cm**3，这个圆锥体积是多少．
<gadget id="calculator">30 / 2</gadget>
<output>15</output>

<result>15</result>