Jawabanmu

2014-05-06T08:14:25+07:00
kel= 2(3x+1)+2(2x+2)
36=6x+2+4x+4
36=10x+6
36-6=10x
30=10x
x=3
jadi, panjang=3x+1=3(3)+1=10
lebar=2x+2=2(3)+2=8
2014-05-06T08:15:20+07:00
Kll = 2(p + l)
36 = 2((3x + 1) + (2x + 2))
36 = 2(5x + 3)
36 = 10x + 6
30 = 10x
x = 3.
p = 3x +1 = 3.3 + 1 =10
l = 2x + 1 = 2.3 + 2 = 8