An electrical wire of 2 mm diameter and 5 m length is insulated with a plastic layer of thickness 2 mm and thermal conductivity k=0.1 W/(m K). It is exposed to ambient air at 30°C. For a current of 5 A, the potential drop across the wire is 2 V. The air-side heat transfer coefficient is 20 W/(m²K). Neglecting the thermal resistance of the wire, the steady state temperature at the wire-insulation interface is ______ °C (rounded off to 1 decimal place).