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= 1600 cm²
1 m² = 10000 cm²
256 m² = 2560000 cm²
1 dam² = 1000000 cm²
1,64 dam² = 1640000 cm²
jumlah luas = 2.560.000 + 1.640.000 = 4.200.000 cm²
jumlah keramik = 4.200.000 / 1.600 = 2625 buah
lantai pertama :
luas lantai = 256 m²
luas keramik = 1600cm² = 0,16m²
cara : 256 / 0,16 = 1.600 keramik
lantai kedua :
luas lantai = 1,64 dam²
luas keramik = 0,0016 dam²
cara : 1,64 / 0,0016 = 1.025 keramik
Jadi 1.025 + 1.600 =2.625 keramik