8- One side of a copper block 5 cm thick is maintained at 250 C. The other side is covered with a layer of fiberglass 2.5 cm thick. The outside of the fiberglass is maintained at 35°C, and the total heat flow through the copper-fiberglass combination is 52 kW. What is the area of the block? Take k for copper=386 W/m.K and for fiberglass30.038 W/m.K. Answ(A=134.7m2)

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