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volume kubus = SxSxS = 14x14x14 = 2.744 cm3
panjang balok = V / l / T = 2.744 / 4 / 14 = 49 cm
s x s x s = p x l x t
14 x 14 x 14 = p x 14 x 4
2744 = 56 p
2744/56 = p
49 = p