Răspuns :
primul mod: P=12,56m=1,256dam
l=1,256dam:4
l=0,314dam
al doilea mod: P=12,56m
l=12,56m:4
l=3,14m=0,314dam
l=1,256dam:4
l=0,314dam
al doilea mod: P=12,56m
l=12,56m:4
l=3,14m=0,314dam