A Boy Wishes to Cross a River in the Shortest $\theta$

question 55

Multiple Choice

A boy wishes to cross a river in the shortest possible time, without necessarily landing directly across from his starting point.He can row at 2 m/s in still water and the river is flowing at 1 m/s.At what angle $\theta$ should he point the bow (front) of his boat?

• A)30 °
• B)45 °
• C)60 °
• D)63 °
• E)90 °

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