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What is the correct answer?
4
The efficiency of the vane blower is (where W₁ = Workdone due to compression, and W₂ = Workdone due to back flow)
A.
W₁/(W₁ + W₂)
B.
W₂/(W₁ + W₂)
C.
(W₁ + W₂)/W₁
D.
(W₁ + W₂)/W₂
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