Answer:
20'x20'
Step-by-step explanation:
Given that an open box is to be constructed from a square piece of sheet metal by removing a square of side 4 feet from each corner and turning up the edges
Let a be the side of the square
When 4 feet is cut from each corner, and made into a box the dimensions would be a-8, a-8 and 4.
Volume of box = lwh
[tex]= (a-8) (a-8) 4[/tex]
This is equal to 576
[tex](a-8) (a-8) 4=576\\2(a-8) =24\\a-8 =12\\a=20[/tex]
Dimensions of the sheet should be 20x20 feet