Question on heat transfer of a plane wall

[sero2000]

Homework Statement

A plane wall of 152 mm thickness has surface area of 2.32 m2. One side of the wall is kept at 82.2 oC, and the other side at 4.4 oC. The thermal conductivity of the wall material is 0.036 W/m.K at 0 oC, and that at 93.3 oC is 0.055 W/m.K. Calculate the rate of heat conduction through the wall

Homework Equations

Q= ∆T/R

The Attempt at a Solution

I do understand how to do this but i gt stuck at the part of the question that says "The thermal conductivity of the wall material is 0.036 W/m.K at 0 oC, and that at 93.3 oC is 0.055 W/m.K"

Anyone can just explain to me what does it mean?

 

[djeitnstine]

That means you should estimate the thermal conductivity at your required temperatures