Physics, asked by archanakk, 4 months ago

A swimmer overcame a raft of wooden block at a point B, when he was in downstream motion. 50 minute
later be turned back and after some time passed the wooden block at a distance 3km from the point B. Find
the stream velocity assuming the swimming speed is constant.​

Answers

Answered by Braɪnlyємρєяσя
0

Explanation:

Considering the given figure below.

Let v

0

be the stream velocity and v

the velocity of motorboat with respect to water. The motorboat reached point B while going downstream with velocity (v

0

+v

) and then returned with velocity (v

−v

0

) and passed the raft at point C. Let t be the time for the raft (which flows with stream with velocity v

0

) to move from point A to C, during which the motorboat moves from A to B and then from B to C.

Therefore

v

0

l

=τ+

(v

−v

0

)

(v

0

+v

)τ−l

On solving, we get v

0

=

l

=3km/hr.

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