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A person going eastwards with a velocity of 3 km

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A person going eastwards with a velocity of 3 km per hour, finds that the wind appears to blow directly from the north. He doubles his speed and the wind seems to come from north-east. Find the actual velocity of the wind.

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Calculus

9th edition

Authors: Dale Varberg, Edwin J. Purcell, Steven E. Rigdon

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