Jawabanmu

2014-06-06T14:02:46+07:00
P=5x , l=4x, t=3x
l =p *l
180 = 5x * 4x
180 = 20x^2
x^2 = 180/20
x = akar dari 9
x = 3
maka....p=5*3 = 15cm
l = 4*3 = 12cm
t = 3*3 =9cm
v = p.l.t
 = 15.12.9
v = 1620cm^3