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20cm - 0,2m
P= 0,2*0,2= 0,04
6m:0,04m = 150
Nalezy kupić 150 płytek
P= 200 cm * 300 cm
P= 60000
P= 20cm * 20 cm
P= 400 cm
60000cm/400 cm = 150
Odp: 150
:D
3m = 300 cm
200cm * 300cm = 60000cm²
pole 1 kafelki wynosi: 400 cm²
60000cm²/400 cm²=150
Odp. Potrzeba 150 kafelek.