Tolong jawab pakai cara besok mau dikumpulkan

volume kubus =s*s*s
                       =30*30*30
                       27.000
volume balok=s*s*s
                     =30*(30-8-8)*8
                     =3.360
volume seluruh permukaan =volume kubus+volume balok
                                             =27.000+3.360
                                             =30.360