Jawabanmu

2014-05-23T19:52:24+07:00
(4x + 3x + x)4 = 160
32x = 160
x = 5
p=4x = 20
l= 3x = 15
t= x = 5

v = plt = 20x15x5= 1500 cm³
Lp = 2(pl) + 2(pt) + 2 (lt)
2(300) + 2(100) + 2(75)
600 +200 + 150
=950 cm²