A mine fan produces 30 m3/s of air at 240 Pa pressure running at 1400 rpm. If the fan speed is increased to 2100 rpm, the pressure in Pa and the quantity in m3/s generated by the fan will be
A. 540 and 67.5
B. 540 and 45.0
C. 360 and 45.0
D. 540 and 30.0
Answer: Option B
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