- #1

- 134

- 0

## Homework Statement

what is the maximum volume of an open top box that can be created with 300m sq of metal assuming none is wasted?

## Homework Equations

## The Attempt at a Solution

so that means the surface area of the box must total 300 m sq

so

A(l,w,h)= lw + 2lh + 2wh = 300

and volume is given by

V(l,w,h) = lwh

my problem is when taking partials for l w and h in the area equation, I get 0 as the critical points. Are my equations wrong?