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K= 2 (3 CM +2L)
K= 6CM + 4L
54 = 6CM + 4L
54-6 = 4L
48=4L
L=12
K=2(P+L)
27 = P +12
27-12=P
P = 15
mka luas = p x l
=> 12 X 15
=> 180 CM²