A cylinder and a cone have the same base area and volume. Given that the height of the cylinder is 5dm, what is the height of the cone in dm?
一个圆柱和一个圆锥的底面积和体积分别相等．已知圆柱的高是5dm，那么圆锥的高是多少dm．
<gadget id="calculator">5 * 3</gadget>
<output>15</output>

<result>15</result>