Jawabanmu

2014-06-10T15:01:44+07:00
L Permukaan Balok = 2 ( pl + pt + lt )
2 ( 12.10 + 12.6 + 10.6 )
2 ( 120 + 72 + 60 )
2 ( 252 )
Luas Permukaan Balok = 504 cm2
2014-06-10T15:02:07+07:00
Jawab = 2(pl+pt+lt)
          = 2 (12x10+12x6+10x6)
         = 2 x 252
         = 504