Question

The length and the breath of the rectangular playground are in the ratio $7:5$. If the length of playground is $112$ m, what is its perimeter?

Answer 1

Given The Length and breadth ob rectangular playground in the ratio

$7:5$

Given length$=112m$

Let breadth$=B$

$\frac{7}{5}=\frac{112}{B}$

$\Rightarrow 7B=112\times 5$

$\Rightarrow B=\frac{112\times 5}{7}$

$\Rightarrow B=80cm.$

Perimeter $=2(l+b)$

$=2(112+80)$

$=2\left(192\right)$

$=384cm.$