Question

The length of a rectangle is three times its width. It the perimeter is 84m,find the length of the rectangle

Answer 1

Let the breadth be 'x'm

Length is equal to three times breadth=3x

Perimeter=84m

2(l+b)=84m

2(3x+x)=84

2(4x)=84

4x=84/2

4x=42

x=42/2

x=10.5

Therefore length=3x=3(10.5)=31.5m

Breadth=x=10.5m