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Luas = ???
Harga = ???
Jawab :
S × 4 / S + S + S + S = Keliling
S × 4 = 80 meter
... × 4 = 80 m
20 × 4 = 80 m
Sisi = 20 m
Luas = S × S
Luas = 20 × 20 = 400 m²
Harga = Luas (m²) × 150.000
Harga = 400 × 150.000 = 60.000.000
Harga = Rp 60.000.000