Question

A river is flowing from west to east with a speed $5\,m\,s^{-1}$. A swimmer can swim in still water at a speed of $10\,ms^{-1}$. If he wants to start from point $A$ on south bank and reach opposite point $B$ on north bank, in what direction should he swim?

• A. $30^?$ east of north
• B. $60^?$ east of north
• C. $30^?$ west of north
• D. $60^?$ west of north

Answer 1

Answer: (C)

$30^?$ west of north

Answer 2