Question

The ratio between the length and width ps rectangular sheet of paper is 7:5 if the width of the sheet is 20.5 find the length
With the workings

Answer 1

$$\begin{gathered} \mathrm{Let}\mathrm{l}\mathrm{be}\mathrm{the}\mathrm{length}\mathrm{and}\mathrm{b}\mathrm{be}\mathrm{the}\mathrm{breadth}. \\ \mathrm{Now},\frac{\mathrm{l}}{\mathrm{b}}=\frac{7}{5} \\ \mathrm{now},\mathrm{b}=20.5\mathrm{cm} \\ \mathrm{So},\frac{\mathrm{l}}{20.5}=\frac{7}{5} \\ \Rightarrow \mathrm{l}=\frac{205\times 7}{50}=28.7\mathrm{cm} \end{gathered}$$