Question : A river is flowing from W to E with a speed of 5 𝑚/𝑚𝑖𝑛. A man can swim in still water with a velocity 10 𝑚/𝑚𝑖𝑛. In which direction should the man swim so as to take the shortest possible path to go to the south
(A) 30° with downstream
(B) 60° with downstream
(C) 120° with downstream
(D) South
Answer : option (C)
Solution :

