Conductivity and resistivity: Ohm's law

The circuit shown below has two cylindrical conductors, $\text A$start text, A, end text and $\text B$start text, B, end text, of radii, $r_\text A=a$r, start subscript, start text, A, end text, end subscript, equals, a, and $r_\text B=3a$r, start subscript, start text, B, end text, end subscript, equals, 3, a respectively, connected in series.

The electric fields in the two conductors, $|\bold E_\text A|$vertical bar, E, start subscript, start text, A, end text, end subscript, vertical bar and $|\bold E_\text B|$vertical bar, E, start subscript, start text, B, end text, end subscript, vertical bar, are such that $|\bold E_\text A|=9|\bold E_\text B|$vertical bar, E, start subscript, start text, A, end text, end subscript, vertical bar, equals, 9, vertical bar, E, start subscript, start text, B, end text, end subscript, vertical bar.