Beth R. answered • 03/31/16

Tutor

2
(1)
Biology & Chemistry Degrees w/ Teaching & Tutoring Experience

Hi Navi,

We need to write out algebraic equations to describe the information we have, then solve them using substitution.

We will define length as a and width as b.

we know that a x b = 1600 cm

^{3 }(area = length x width)and a=4b

So, we can substitute the vaule 4b for a in the first equation:

4b x b = 1600

we can simplify to 4b

^{2}= 1600divide both sides by 4:

b

^{2}= 400take the square root of each side:

b = √400

b=20

So we know the width = 20

length = 4 x width = 80