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Verified answer
Luas lantai = 5 x 3 = 15 m2 (150.000 cm2).Luas Keramik = 30 x 30 = 900 cm2.
Banyak ubin yang digunakan = 150.000 ÷ 900 = 166 Keramik.
= 500 cm X 300 cm
= 150000 cm : (30²)
= 150000 cm : 900 cm
= 167 buah
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