Suppose sarah is trying to design a metal box (a rectangular prism), which will hold 200 cubic centimeters of liquid. the length of the box must be 4 times as large as the width.

Volume = length * width * height = lwh (measured in cubic units)

so 2000 cm^3 = lwh

we know that l = 4w so sub that into the equation

2000 = (4w) * w*h

2000 = 4w^2*h

You didn't include the rest of the question so this is as far as i can go.