Question

Answer 1

\(R=p\dfrac{l}{S}\Rightarrow l=\dfrac{R\cdot S}{p}=\dfrac{10\cdot\left(\pi\dfrac{2^2}{4}\right)\cdot10^{-6}}{2,8\cdot10^{-8}}\approx1121,43\left(m\right)\)

Answer 2

\(l=\dfrac{R\cdot S}{\rho}=\dfrac{10\cdot\pi\cdot\left(\dfrac{2\cdot10^{-3}}{2}\right)^2}{2,8\cdot10^{-8}}=1122m\)