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1,4x2+0,8x2=4,4m
4,4+6=10,4
obwód 2okna=1,40m*2+80cm*2=2,80m+160cm=2,80m+1,60m=4,40
6m+4,4m=10,4
odp.Na uszczelnianie okien Artur zużyje 10,4m taśmy