Answer: 64 cm
Explanation:
V = 384 cm ; 6 cubes
(6)(side^3)/6 = 384/6 (divide both sides by 6)
s^3 = 384/6
s^3 = 64
v = 1 = 64
s = 3sq root of 64
s = 4 cm
now, we're looking at the 4 squares that's gonna be unpainted
A = 4^2 = 16
= 4 (16)
A = 64 cm is the area of the unpainted surface
sorry for the late answer i hope this helps
good luckseu