Pressure characteristic of a mine fan is given by. P = -0.06Q2 + 400. where P is the pressure in Pa and Q is the quantity in m3/s. The resistance of the mine is 0.19 Ns2/m8. The mine quantity in m3/s is
A. 160
B. 56.57
C. 45.9
D. 40
Answer: Option D
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