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=
s = ... (1)
V = 768
V = Luas alas x t
V = x t
768 = x t
768 = x t
768 =
= 768 x
=
= 1728
t =
t = 12 cm
Dari persamaan (1) diketahui:
s =
s = x 12
s =
s = 8 cm
Luas alas =
Luas alas =
Luas alas = 64
Luas permukaan = + 4st
Luas permukaan = + 4(8)(12)
Luas permukaan = 2(64) + 384
Luas permukaan = 128 + 384
Luas permukaan = 512