Let side of the two cubes be $$a$$ and $$b$$ units respectively Ratio of volumes = $$frac{a^3}{b^3}=frac{11}{13}$$ => $$frac{a}{b}=(sqrt[3]{frac{11}{13}})$$ => $$frac{a}{b}=(11)^{frac{1}{3}}:(13)^{frac{1}{3}}$$
=> Ans - (D)