A cylinder and a cone have the same volume, and the ratio of the base radii of the cylinder to the cone is 2:3. If the height of the cone is 6dm, what is the height of the cylinder in dm?
一个圆柱和一个圆锥的体积相等，且圆柱和圆锥的底面半径的比是2：3，如果圆锥的高是6dm，则圆柱的高是多少dm？
<result>4.5</result>