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GS Geography Physical Geography of World
Q.

Speed of wind is measured by:
Explanation:

ANS. (D) 
An anemometer is a device for measuring wind speed, and is a common weather station instrument. The term is derived from the Greek word animus, meaning wind, and is used to describe any airspeed measurement instrument used in meteorology or aerodynamics. The first known description of an anemometer was given by Leon Battista Alberti around 1450.

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