Question

The length of a rectangle is three times its width and its perimeter $56m$. Find its length

Answer 1

Let the length of the rectangle be x

Breadth = $\frac{x}{3}$

Perimeter = 56 m

2(l+b) = 56 m

l+b = 28 m

$x+\frac{x}{3}$ = 28 m

4x = 80 m

x = 21 m

length = 21 m Breadth = 7 m