Respuesta :

SA of box J
2lw + 2hl + 2hw
2(2)(3) + 2(4.5)(2) + 2(3)(4.5)
12 + 18 + 27
57 cubic feet

SA of box F
2(3)(3) + 2(3)(3) + 2(3)(3)
18 + 18 + 18
54 cubic feet

57-54= 3 cubic feet difference