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Heat A composite wall is made of four different materials of construction in the fashion shown below. The resistance (in K/W) of each of the

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A composite wall is made of four different materials of construction in the fashion shown below. The resistance (in K/W) of each of the sections of the wall is indicated in the diagram. 0.25 Direction of heat flow 15. 3 Direction of heat flow 0.7 1 A The overall resistance (in K/W, rounded off to the first decimal place) of the composite wall, in the direction of heat flow, is

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