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.
Basically u do 5÷2=2 1/2
so each person gets 2 slices with 1/2 left
4/12 / 1/12 & 4/12 / 48/12 are how you make them equal, although i'm not sure about the rest
$24.89
23x0.0822=1.89
23+1.89=24.89