Question 1096055
Let length=l=5,width=w=7,height=h=3

The box is 3-dimensional, with 6 faces. So we have three possible combinations, and for each combination we should multiply by 2 to account for a parallel face

(5)(7)(2)=70
(5)(3)(2)=30
(7)(3)(2)=42

70+30+42=142 sq in (Answer)