Question

please answer me & also explain please because I need it

Answer 1

I hope you understand vectors

suppose his velocity is V

and stream's velocity v

Now he reaches the point exactly opposite to were he started, so essentially his velocity in the direction of flow is zero

V cos 120 + v = 0

0.5 (-1/2) + v =0

v=0.25 m/s

Hope it helps, ask doubts in comment

Answer 2

Your answer is....


D. 0.25 m/s.



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