Question

Length of a rectangle is thrice that of its breadth. Perimeter of a rectangle is 80 metres. (Take m to be length of a rectangle)​

Answer 1

$\texttt{Let the length and breadth of the}$

$\texttt{rectangle be 3x metre and x metre resp.}$

$\large\texttt{A/q}$

$\mathtt{2(3x+x) = 80}$

$\implies\mathtt{2×4x = 80}$

$\implies\mathtt{8x = 80}$

$\implies\mathtt{x = \large\frac{80}{8}}$

$\implies\mathtt{x = 10}$

$\therefore\texttt{Length of rectangle } \mathtt{ = 3×10 = 30m}$

$\& \; \texttt{Breadth of rectangle }\mathtt{ = 10m}$