Question

An open-top reinforced box is to be made from a 12- by 36-inch piece of cardboard by cutting along the marked lines, discarding the shaded pieces, and folding as shown in the figure. If the box must be less than 2.5 inches high, what size squares should be cut from the corners in order for the box to have a volume of 448 cubic inches?

Answer 1

is i 1.088?

Answer 2

i think 1.088 by 1.088 squares nearly.