tolong yaaa ... yg pake kubik susah

V = s³
= 21³
= 9261 cm³

K = 12 x s
= 12 x 21
= 252

L. permukaan = 6 x s
= 6 x 21
= 126cm²

V=S×S×S
=21×21×21
=9.261 CM3
K=12×S
=12×21
=252 CM
LP=6×S×S
=6×21×21
=2.646 CM2