The sum of the volumes of a cylinder and a cone with the same base and height is 48cm**3, then what is the volume of the cone in cm**3.
等底等高的圆柱体和圆锥体，它们的体积之和是48cm**3，那么这个圆锥体的体积是多少cm**3．
<gadget id="calculator">3 + 1</gadget>
<output>4</output>

<gadget id="calculator">48 / 4</gadget>
<output>12</output>

<result>12</result>