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Verified answer
Luas lantai= 3 x 3
= 9 m²
Luas keramik
= 25 x 25
= 625 cm²
maka,
banyak keramik
= 9 m² : 625 cm²
= (9x10.000) cm² : 625 cm²
= 90.000 : 625
= 144 buah
Jadi,
biaya membeli seluruh keramik
= 144 x 4.000
= 576.000 rupiah
Luas keramik : 25cm × 25cm = 625cm2
Keramik yg harus dibeli : 90000 : 625 = 144 buah
Yg harus dibayar : 144 × Rp4.000,00 = Rp576.000,00