What is the geometric mean of two heat transfer areas A₁ and A₂ ?

1.	What is the geometric mean of two heat transfer areas A₁ and A₂ ?
A.	(A₁ . A₂)
B.	(A₁ + A₂)
C.	/2 √(A₁ . A₂)
D.	√(A₁ . A₂)
Answer» B. (A₁ + A₂)

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What is the geometric mean of two heat transfer areas A₁ and A₂ ?

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