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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
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
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