If 1700 square centimeters of material is available to make a box with a square base and an open top, find the largest possible volume of the box.

Volume = cubic centimeters

1700 = x^2+4*x*h

4xh=1700-x^2

h=1700-x^2/4x

V=x*(1700-x^2/4)

=1700x-x^3/4

V(x)=1700/4x-1/4x^3

V'(x)=1700/4-3/4x^2

set v'(x)=0

1700/4-3/4x^2=0

3/4x^2=1700/4

3x^2=1700

I am really stuck and i need some guidence and some to compare their answers with me. (Worried)