Question

$80metres$ of cloth is required to make $36shirts$of a certain size. How much cloth will be required to make $45shirts$ of the same size?

Answer 1

Given that

$80metres$ of cloth is required to make $36shirts$

Let $xmetres$of cloth is required to make $45shirts$

We have

$$\begin{gathered} 80:36=x:45 \\ x=\frac{80\times 45}{36} \\ x=\frac{3600}{36} \\ x=100 \end{gathered}$$

Hence $100metres$ of cloth is required to make $45shirts$