[tex]\begin{gathered} \text{Note } \\ \text{For similar shapes, } \\ \text{ratio of volumes = ( ratio of length)}^3 \end{gathered}[/tex][tex]\begin{gathered} \text{ratio of dimensions of the spheres = 2:3} \\ \text{Ratio of thier volumes = (2:3)}^3 \\ =\text{ 8 : 27} \end{gathered}[/tex]