Q74
In a mine ventilation system, the resistances of two splits A and B are 0.5 Ns2m-8 and 2 Ns2m-8 respectively. Combined resistance of two shafts and trunk airways is 0.7 Ns2m-8. A quantity of 20 m3/s of air passes through split A. The total air power of the ventilation system in kW are
A.
82.9
B.
48.9
C.
24.9
AnswerD.
27.9
Answer: Option C
Solution
Answer: Option C
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