Question
A 16 m high wind break is constructed to protect soil from wind erosion due to wind velocity of 18 m s-1 at 15 m height. The minimum wind velocity at 15 m height capable of moving the soil fraction is 8 m s-1. The angle of deviation of prevailing wind direction from the perpendicular to the wind break is 300. The distance of full protection from the wind break in m is
Answer: Option B
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