Question

PLEASE HELP!! WILL MARK BRAINLEST!!!

Answer 1

Answer: $64cm$

Step-by-step explanation:

$length=3w\\width=w\\area=192cm^2\\perimeter=?$

First, using the area formula, find length and width;

$A=l*w$

$192=3w*w$

$192=3w^2$

Divide by 3.

$\frac{192}{3}=w^2$

$64=w^2$

Extract the square root.

$\sqrt{64}=w\\ 8=w$

Now that you found the width; find length.

if length is three times width; multiply the width by 3.

8*3=24cm

Now that you have all the information, find the perimeter.

$P=2(l+w)\\P=2(24+8)\\P=2(32)\\P=64cm$

Answer 2

Answer:

x: length

y: wide

x = 3y and x*y =192

=> 3y^2 = 192

=> y = 8 => x =3x8 = 24

=> Perimeter = (x+y)*2 = (8+24)*2 = 64