Two parallel plates
A and
B are joined together to form a compound plate. The thickness of the plates are
4.0 cm and
2.5 cm respectively and the area of cross-section is
100 cm2 for each plate.
The thermal conductivities are
KA=200 W/∘C m for the plate
A and
KB=400 W/∘C m for the plate
B. The outer surface of the plate
A is maintained at
100∘C and the outer surface of the plate B is maintained at
0∘C. Find the rate of heat flow through any cross-section.