The temperature variation under steady heat conduction across

The temperature variation under steady heat conduction across a composite slab of two materials with thermal conductivities k₁ and k₂ is shown in figure then, which one of the following statements holds?

Q = KA	dt
	dx

where Slope =	dt	=	Q
	dx		KA

i.e., slope is more for less value of K, therefore

	dt			>		dt
	dx		_{Ⅰ material}			dx		_{Ⅱ material}

∴ K₁ < K₂