Question : A man wants to reach point 𝐵 on the opposite bank of a river flowing at a speed as shown in figure. What minimum speed relative to water should the man have so that he can reach point 𝐵? In which direction should be swim?
(A) 𝑢√2
(B) 𝑢/√2
(C) 𝑢/√2
(D) 𝑢/2
Answer : option (C)
Solution :

