Different column width in `tcolorbox` with `sidebyside` option

Question

The default output of sidebyside option in tcolorbox environment is two equal-side columns (Refer to the MWE). But what is needed is to produce difference two difference column width. How can we get the first column with .7\textwidth and the second column with .3\textwidth?

\documentclass{article}
    \usepackage{tcolorbox}
    \begin{document}
        \begin{tcolorbox}[sidebyside]
            hello world hello world hello world 
            \tcblower
            world
        \end{tcolorbox}
    \end{document}

Answer 1

According to @SalimBou's comment, we can use the ready-made key righthand width.

\documentclass{article}
    \usepackage{tcolorbox}
    \begin{document}
        \begin{tcolorbox}[sidebyside,righthand width=.3\textwidth]
            hello world hello world hello world 
            \tcblower
            world
        \end{tcolorbox}
    \end{document}