Zadanie 109
1)
\frac{l}{2\pi r}=\frac{\alpha}{360^o}
r=x
\frac{l}{2\pi x}=\frac{100}{360}
mnożę “po skosie”
360l=100*2\pi x
360l=200\pi x/:40
9l=5\pi x/:9
l=\frac{5\pi x}{9}=\frac{5}{9}\pi x P
-
\frac{P_w}{P_k}=\frac{\alpha}{360}
\frac{P_w}{P_k}=\frac{100}{360}*100\%=\frac{5}{\not18^9}*\not100^{50}\%=\frac{250}{9}\approx28\% F