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

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