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140 cm + 10 cm = 150cm
14 dm = 1.4 m
150 cm = 15 dm = 1.5 m
P=a*h = 1.5m * 1.4m=2.1m kwadratowych
14dm=140cm
140cm+10cm=150cm
P=150*140=21000cm2
21000cm2=2,1m2