keeping in mind there are 7 days in a week.
[tex]\bf \begin{array}{ccll}
inches&days\\
\text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\
6&7\\
x&24
\end{array}\implies \cfrac{6}{x}=\cfrac{7}{24}\implies \cfrac{6\cdot 24}{7}=x[/tex]