Please see the attached file for the entire problem.
Problem. The ratio of thermal Conductivity of material 1 to the thermal
Conductivity of material 2 is
(a)Less than 1 (b) greater than 1 (c) equal to 1 (d) infinity
And why? Give reason
There is a plot given in problem file in which both material shown.
Answer will be (a)
According to Fourier's law of conduction
q = - k* (∆T/∆X)
Where q is the heat transfer per unit area
∆T/∆X = Change in temperature with distance
The solution contains a detailed explanation as to how to compare the conductivities of two separate materials from a plot comparing temperature and distance.