Hello
We already have the metric in the question
[tex]1in=2.54\operatorname{cm}[/tex]
How many inches is in 50.8cm
[tex]\begin{gathered} 1in=2.54\operatorname{cm} \\ x\text{ in}=50.8\operatorname{cm} \\ x=\frac{1\times50.8}{2.54} \\ x=20in \end{gathered}[/tex]
From the calculation above 1cm is equal to 20in
