Jawabanmu

2014-05-05T19:51:27+07:00
27m² = 270.000cm²
luas keramik = 30 × 30 = 900cm²
(270.000 : 900) : 10 = 30 dus
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2014-05-05T19:52:51+07:00
Dik: L.lantai=27 m², L.keramik=(30×30)=900cm²=0.09m²

jwb: 27÷0.09=300keramik

300÷10=30dus keramik
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