Odpowiedź:
[tex]L=2\pi r\\\\\pi =3\\\\54=400*2\pi r\\\\54=400*2*3*r\\\\54=2400r\\\\2400r=54\\\\r=\frac{9}{400\\}\\ \\\frac{9}{400}m =0,0255=2,25cm[/tex]
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Odpowiedź:
[tex]L=2\pi r\\\\\pi =3\\\\54=400*2\pi r\\\\54=400*2*3*r\\\\54=2400r\\\\2400r=54\\\\r=\frac{9}{400\\}\\ \\\frac{9}{400}m =0,0255=2,25cm[/tex]