EAMCET Engineering 2008 Solved Paper

Two slabs A and B of equal surface area are placed one over the other such that their surfaces are completely in contact. The thickness of slab A is twice that of B. The coefficient of thermal conductivity of slab A is twice that of B. The first surface of slab A is maintained at 100∘C, while the second surface of slab B is maintained at 25∘C. The temperature at the contact of their surfaces is