A) 1.0 m/s
B) 0.5 m/s
C) 0.25 m/s
D) 0.43 m/s
Correct Answer: C
Solution :
Let u be the speed of stream and v the speed of person starts from A and wants to reach at point B directed opposite to A. |
As given, v makes an angle of \[120{}^\circ \] with direction of flow u, the resultant of v and u is along AB. From figure |
\[u=v\sin \theta =v\sin \,{{30}^{o}}\] |
\[\therefore \] \[u=\frac{v}{2}=\frac{0.5}{2}\] \[(v=0.5\,m/s)\] |
\[=0.25\text{ }m/s\] |
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