Question

The ratio of the length of a field to its width is $5:3.$ Find its length if the width is $42$ metres.

Answer 1

Given: Length : Width $=5:3$
Let the length and the width of the field be $5xm$ and $3xm$, respectively.
Width $=42m$ [given]

$\Rightarrow 3x=42$

$\Rightarrow x=\frac{42}{3}=14$

$\therefore$ Length $=5x=5\times 14=70$ metres