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192 = 4a x 3a x 2a
192 = 24a³
a³ = 8
a = 2
p = 4.2 = 8 cm
l = 3.2 = 6 cm
t = 2.2 = 4 cm
luas balok = 2 (pl + lt + pt)
= 2 (8.6 + 6.4 + 8.4)
= 2 (48 + 24 + 32)
= 2 (104)
= 208 cm²
semoga membantu ya :)