The resistance of a wire of iron is $10\,\,ohm$ and temp. coefficient of resistance is $5\,\, \times \,\,{10^{ - 3}}{/^0}C$. At $20\,{\,^0}C$ it carries $30{\mkern 1mu} {\mkern 1mu} \,{\rm{milli}}\,\,{\rm{ampere}}$ of current. Keeping constant potential difference between its ends, the temperature of the wire is raised to $120\,{\,^0}C$. The current in ${\rm{milli}}\,\,{\rm{ampere}}$ that flows in the wire is