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?

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 :

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 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?
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