For the same roadway roughness, area, length and velocity condition the ratio of resistances of a square roadway to that of a rectangular roadway having width and height ratio. 2 : 1 is
A. $$\frac{1}{{\sqrt 3 }}$$
B. $$\frac{{2\sqrt 2 }}{3}$$
C. $$\frac{{3\sqrt 2 }}{2}$$
D. $$\frac{{\sqrt 2 }}{3}$$
Answer: Option B
This Question Belongs to Mining Engineering >> Mine Ventilation
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