Solve the below:
Q: Consider a tube wall of inner and outer radii r; and ro, whose temperatures are maintained at Ti and To, respectively. The thermal conductivity of the cylinder is temperature dependent and may be represented by an expression of the form k = ko< 1="" +="" at),="" where="" ko="" and="" a="" are="" constants.="" obtain="" an="" expression="" for="" the="" heat="" transfer="" per="" unit="" length="" of="" the="" tube.="" what="" is="" the="" thermal="" resistance="" of="" the="" tube="" wall="">