(A) requires less surface area as compared to Savonius type windmill
(B) has two or three blades shaped like aerofoils
(C) runs independently of the direction of the wind
(D) all of the above
(A) requires less surface area as compared to Savonius type windmill
(B) has two or three blades shaped like aerofoils
(C) runs independently of the direction of the wind
(D) all of the above
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