# If the speed of the stream is v and the speed of the boat with respect to the stream is u, then which of the following gives the correct relationship between u and v u=v u=3v v=2u v=3u

Velocity of boat w.r.t stream is u
Time taken by boat to go downstream, t = d/ (u+v)  ......(1)
Time taken by boat to go upstream, 2t = d/ (u-v)  .........(2)
From equation (1) and (2)
2*d/ (u+v) = d/ (u-v)
-> 2*(u-v) = (u+v)
-> u =3v
Option (2) is correct

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