Jawabanmu

2014-06-06T22:30:37+07:00
K = 2 (p+l)
60 = 2 (3x + 2x)
60/2 = 3x + 2x
30 = 5x
30/5 = x
6 = x

p= 3x          l= 2x
= 3.6 = 18    = 2.6 = 12

L= PxL 
= 18 .12 = 216