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Arithmetic mean area can be used in heat transfer problem to calculate the heat flow by conduction through a cylinder which is | |
A. | thin walled having the value of Ao Ai/< 2. [Correct Answer] |
B. | thick walled. [Wrong Answer] |
C. | having the value of Ao/Ai > 2. [Wrong Answer] |
D. | both (b) and (c). [Wrong Answer] |