The volume of a cylinder is 20dm**3 larger than that of a cone with the same base and height. What is the volume of this cone in dm**3?
一个圆柱比与它等底等高的圆锥体积多20dm**3，这个圆锥体积是多少dm**3．
<gadget id="calculator">20 / 2</gadget>
<output>10</output>

<result>10</result>