Jawabanmu

2014-05-29T12:29:05+07:00
Jadi 240 cm = 4.5x+ 4.4x + 4.3x
240 = 20 x + 16 x + 12 x
240= 48 x
5 = x

panjang = 5.5 = 25 cm
lebar = 4.5 = 20 cm
tinggi = 3.5 = 15 cm

volume = 25.20.15
= 7500 cm3
2014-05-29T12:31:39+07:00
P=240 CM
240/5=48CM
maka
p = 5 * 48 = 240 cm
l = 4 * 48 = 192 cm
t = 3 * 48 = 144 cm

jadi volume = p * l * t
                 = 240 * 192 * 144
                 = 6.635.520 cm^3