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.

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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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