AnnabelleRose
AnnabelleRose AnnabelleRose
  • 24-06-2017
  • Mathematics
contestada

The length of a rectangle is four times its width.
If the area of the rectangle is 144 yd^2, find its perimeter.

Respuesta :

ghanami
ghanami ghanami
  • 24-06-2017
hello; 
x is the length  , y the width : 
x = 4y...(1)
xy = 144....(2)
subsct in (2) : 4y(y) = 144
y² = 36
y = 6 yd   so : x = 24 yd 
the perimeter is : 2(6+24) =60 yd
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