The diameter and height of the base of a cylinder are both 5 decimeters. If a cone is equal to its volume and its base area is also equal, what is the height of the cone?
一个圆柱底面直径和高都是5分米，如果一个圆锥和它体积等，底面积也相等，那么圆锥的高是多少？
<gadget id="calculator">5 * 3</gadget>
<output>15</output>

<result>15</result>