A piston pump is driven by a $5 \mathrm{~m}$ diameter horizontal axis wind turbine for supplying water from a borehole with a total pump head of $10 \mathrm{~m}$. The mean velocity of air is $18 \mathrm{~km} \mathrm{~h}^{-1}$ and the density of air is $1.29 \mathrm{~kg} \mathrm{~m}^{-3}$. The actual power coefficient of the wind turbine is 0.30 and the overall pump efficiency is $60 \% .$ Neglecting the transmission losses, the expected pump discharge in $\mathrm{L} \mathrm{s}^{-1}$ will be

(A) 2.90

(B) 5.80

(C) 28.50

(D) 32.27

A piston pump is driven by a $5 \mathrm{~m}$ diameter horizontal axis wind turbine for supplying water from a borehole with a total pump head of $10 \mathrm{~m}$. The mean velocity of air is $18 \mathrm{~km} \mathrm{~h}^{-1}$ and the density of air is $1.29 \mathrm{~kg} \mathrm{~m}^{-3}$. The actual power coefficient of the wind turbine is 0.30 and the overall pump efficiency is $60 \% .$ Neglecting the transmission losses, the expected pump discharge in $\mathrm{L} \mathrm{s}^{-1}$ will be

(A) 2.90

(B) 5.80

(C) 28.50

(D) 32.27

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