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ukuran ruangn = 2,8 m x 1,6 m = 280 cm x 160 cm
Ukuran keramik = 40 x 40 cm
maka :
Luas ruangan = 280 x 160 = 44.800 cm²
Luas keramik = 40 x 40 = 1.600 cm²
Jdi banyak keramik yg dibutuhkn = 44.800/1.600 = 28 buah
byk krmik yg diperlukan = 44800cm ÷ 40cm = 1120 kramik