A ring and a solid sphere roll down the same inclined plane without slipping. They start from rest. The radii of both bodies are identical and the…

A ring and a solid sphere roll down the same inclined plane without slipping. They start from rest. The radii of both bodies are identical and the ratio of their kinetic energies is $\displaystyle \frac{7}{x}$, where $\displaystyle x$ is $\displaystyle \_\_\_\_$.