Posted by Stephen on .
A rectangular box has a square crosssection and the sum of its length and the perimeter of this crosssection is 2 m. If the length of the box is x m, show that its volume V m^3 is given by V = [x(2x)^2]/16.
Hence find the maximum volume of the box.

Maths calculus 
un,
2/27m^3
x=2/3