What is the formula for the maximum air passing per second at maximum efficiency?
(a) maximum air passing = 2 * volume of air passing per second
(b) maximum air passing = volume of air passing per second
(c) maximum air passing = 2 / volume of air passing per second
(d) maximum air passing = volume of air passing per second / 2
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I want to ask this question from Design of Fan in division Aspects of Design of Mechanical Parts of Design of Electrical Machines