\(\Delta V =3.4\,V\)

Using Ohm's Law

\(R =\frac{3.4}{2}=1.7 \Omega\)

\(1.7=\frac{\rho L }{ A }\)

\(L =\frac{1.7( A )}{\rho}\)

\(M =(\text { density volume })\)

\(Volume =\frac{8.92 \times 10^{-3}}{8.92 \times 10^3}=10^{-6}\)

\(L ^2=\frac{1.7}{\rho}\left(10^{-6}\right)=\frac{1.7}{1.7} \times 10^2\)

\(L =10\,m\)