Tolong dong kak nomer 1 dan 2 pakai cara. Makasih sebelumnya (:

1. V balok= pxlxt = 7 x 4 x 3 = 84 cm
V prisma = (1/2 a x t) x t = 1/2 5 x 12 x15 = 450 cm
V prisma = (1/2 a x t) x t = 1/2 17 x 8 x 22 = 1496 cm

2. V b = s x s x s    Lp b= 6 x s x s
          = 6 x 6 x 6           = 6 x 6 x 6
          = 216 cm             = 216 cm
 
V a = 1/2 a x t x t       Lp a = 2 x La + Ka x t
       = 1/2 6 x 6 x 6            = 2 x 18 + (6+6+6) x 6
       = 108 cm                    = 36 + 108
                                          = 144 cm