A6-m-long 2-kW electrical resistance wire is made of 0.2-cm-diameter stainless steel (k 15.1 W/m C).

A6-m-long 2-kW electrical resistance wire is made of 0.2-cm-diameter stainless steel (k 15.1 W/m · °C). The resistance wire operates in an environment at 30°C with a heat transfer coefficient of 140 W/m2 · °C at the outer surface. Determine the surface temperature of the wire (a) by using the applicable relation and (b) by setting up the proper differential equation and solving??

my question what is the boundry conditions to be used