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 A wall of thickness 0.6 m has width has a normal area 1.5 m2 and is made up of material of thermal conductivity 0.4 W/mK. The temperatures on the two sides are 8000 C and 1000 C. What is the thermal resistance of the wall?                (IES-07)

a. 1 W/K                      b. 1.8 W/K

c. 1 K/W                      d. 1.8 K/W                 

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