Question

The ratio of the length of an airplane wing to its width is 9 to 1. If the length of a wing is 40.4 ​meters, how wide must it​ be?

Answer 1

$\bf \textit{ratio of length to width 9:1}\implies \cfrac{length}{width}=\cfrac{9}{1}\implies \cfrac{40.4}{w}=\cfrac{9}{1}$

solve for "w".