Jawabanmu

2014-05-01T11:06:58+07:00
Luas permukaan= 2 {(p.l)+(p.t)+(l.t)}
{(p.l)+(p.t)+(l.t)} = 234
4x.3x + 4x.2x + 3x.2x = 234
12x + 8x + 6x = 234
26x= 234
x = 9

p= 4.9 = 36
l= 3.9 = 27
t= 2.9 = 18

InsyaAllah
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2014-05-01T11:14:46+07:00
Diket=balok
p:l:t=4:3:2
L=468cm"

misal=4x
        =3x
        =2x
L=2(pl + pt + lt)
468 =2(4x.3x + 4x.2x + 3x.2x)
468=2(12x" + 8x" + 6x")
468=2(26x")
52x"=468
   x"=468/52
   x"=9
   x=3

p = 4x=4.3=12
l  = 3x=3.3=9
t  = 2x=2.3=6

panjang =12cm
lebar     = 9cm
tinggi    = 6cm
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