Jawabanmu

2014-05-01T19:22:39+07:00
Berarti p=12 dan l=9
karena12/9=4/3
dan 12x9=108cm^2
t=2/3.9
t=6 cm

maka v=p.l.t
=12.9.6
=108.6
=648cm^2
2014-05-01T19:23:07+07:00
Misalkan panjang = 4x
lebar = 3x
tinggi = 2x

luas alas = p . l
108 = 4x . 3x
108 = 12x pangkat 2
x = √ 108/12
x = √ 9
x = 3
dapat hasil panjang = 4x = 4.3 = 12
lebar = 3x = 3.3 = 9
tinggi = 2x = 2.3 = 6

volume balok = p.l.t
= 12.9.6
=648 cm kubik