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Keliling = 2(p+l) = 2(3+2) = 10
Luas = p*l = 3*2 = 6
LUAS = 6/10*30cm = 18cm^2
30 = 2 ( 3X + 2X)
30 = 10 X
X = 3
P = 3 x 3 = 9
L = 2 x 3 = 6
luas = P x L = 9 X 6 =54