A boy wishes to row across a river in the shortest possible time. 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 row across a river in the shortest possible time. 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 row across a river in the shortest possible time. 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 Row Across a River in the Shortest