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volume = 648 = plt =4x . 2x . 3x = 24 x³
x³ = 648 / 24 = 27 maka x = 3
p =4.3=12
l = 2.3=6
t =3.3 = 9
luas permukaan = 2( p l + pt + lt) = 2( 12.6+12.9+6.9) = 2(234) = 468