The dimensions given are
[tex]\begin{gathered} \text{width}=24in \\ \text{length}=12ft \\ To\text{ convert the width to the same unit as the length,} \\ 12in=1ft,\text{ therefore} \\ 24in=2ft \\ \text{The ratio of the width to the length is therefore;} \\ 2ft\colon12ft \\ =\frac{2}{12} \\ =\frac{1}{6} \\ \text{The ratio of the width to the length is } \\ \text{Ratio}=1\colon6 \end{gathered}[/tex]