A steel girder of length 10 m has one end rigidly attached to a ship's bulkhead and the other end free. It is subjected to a torsional moment of 30 kNm about its longitudinal axis at the free end. The shear modulus of steel is 80 GPa and the polar moment of inertia of the section is \(6 \times 10^{-4}\) m\(^4\).
The total twist at the free end is ______ \(\times 10^{-4}\) rad (rounded off to one decimal place).