Odpowiedzi

2010-01-13T20:32:51+01:00
2r₁=0,12dm=12mm
r₁=6mm
2r₂=2mm
r₂=1mm

P=πr²
P₁=π*6²
P₁=π*36
P₁≈3,14*36≈113mm²

P₂=π*1²
P₁≈3,14*1≈3,14mm²

a)
3,14/113≈0,02
b)
113-3,14≈109,86
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