The length of a rectangle is three times its width. If the area of the rectangle is 75 yd2 , find its perimeter.

Question

The length of a rectangle is three times its width.
If the area of the rectangle is
75

yd2
, find its perimeter.

Answer 1

Let x = width, then 3x = length, Area = l x w so,

 

(3x)(x) = 75

 

3x² = 75

 

x = 5 = width, length = 15

 

Perimeter = 2l +2w = 10 + 30 = 40