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 $\degree$
B)45 $\degree$
C)60 $\degree$
D)63 $\degree$
E)90 $\degree$

Question

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 $\degree$ 
B)45 $\degree$ 
C)60 $\degree$ 
D)63 $\degree$ 
E)90 $\degree$

Quizplus · Accepted Answer

The Answer of 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 $\degree$ 
B)45 $\degree$ 
C)60 $\degree$ 
D)63 $\degree$ 
E)90 $\degree$

A Boy Wishes to Cross a River in the Shortest θ\thetaθ

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