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6cm = 50*6= 300cm= 3m
10cm = 50*10=500cm= 5m
h= 3m
P= 2*3m*3m+2*5m*3m= 48m²
1 puszka starcza na 6m²
48m²:6m²=8
Odp. Na pomalowanie pokoju potrzeba 8 puszek.