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l = 60 cm
= 0,6 m
t = 50 cm
= 0,5 m
LP = (p × l) + 2(p × t) + 2(l × t)
= (1 × 0,6) + 2(1 × 0,5) + 2(0,6 × 0,5)
= 0,6 + 2(0,5) + 2(0,3)
= 0,6 + 1 + 0,6
= 2,2 m²
Biaya = Luas permukaan × Harga per m²
= 2,2 × 250.000
= 550.000
Jadi biaya pembelian kaca pembuatan aquarium tersebut adalah Rp 550.000,00.