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p =
K = 2p + 2l
280 = (2 x
280 = (2 x
280 =
280 =
l = 280 x
l = 6 m
Nilai l diatas, dimasukkan ke persamaan (1), sehingga menjadi:
p =
p =
p =
p = 8 m
Luas = p x l
Luas = 8 x 6
Luas = 48