Jawabanmu

2014-03-18T19:27:02+07:00
Misal :
panjang = 5n
lebar = 4n

kll = 54 m
2(5n + 4n) = 54
9n = 27
n = 3

p = 5x3 = 15 m
l = 4x3 = 12 m

Luas = p × l
= 15 m × 12 m
= 180 m²
1 1 1
2014-03-18T19:28:14+07:00
K = 54
2 (p+l) = 54
2 (5x+4x) = 54
2. 9x = 54
18x   = 54
  x      = 3

p= 5x=5. 3= 15
l= 4x= 4. 3= 12

L=pxl
  = 15x12
  = 180

Maaf kalo salah