The length of a rectangular field is 2 times its breadth. If the perimeter of the field is 72 m , find its length and breadth.

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Solution

Breadth $= x$
Length $= 2 x$
Perimeter $= 72 m$
Perimeter $= 2 (l + b)$
$\begin{matrix} \Rightarrow 72 = 2 (2 x + x) \Rightarrow 72 = 6 x x = 12 ∴ b r e a d t h = 12 m l e n g t h = 24 m \end{matrix}$

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