Jawabanmu

2014-04-15T19:57:20+07:00
468 = 2 (4x X 3x) + 2 (3x X 2x) + 2 (2x X 4x)
468 = 24x² + 12x² + 16x²
468 = 52x²
    x²= 9
    x = 3

berarti ukuran baloknya 4x, 3x, 2x = 4.3, 3.3, 2.3
                                                  = 12, 9,6
2014-04-15T20:25:37+07:00
2(4x.3x + 4x.2x + 3x.2x) = 468cm2
2(12x + 8x + 6x) = 468
2(26x) = 468
52x = 468
x = 468/52 = 9

ukuran balok :
p = 4(9) = 36
l = 3(9) = 27
t = 2(9) =18
xkuadrat = akar9 = 3

ukuran balok :
p = 4(3) = 12
l = 3(3) = 9
t = 2(3) = 6

ini yg benar :D