A river flows due east with a speed of 3 m/s. A man can swim in still water at a speed of 5 m/s. If he wants to cross the river in the shortest possible time, the angle at which he should swim with respect to the north is:
90 degrees
180 degrees
45 degrees
135 degrees
Related Questions
A child travelling in a train throws a ball outside with a speed V. According to a child who is standing on the ground, the speed of the ball is
Same as V
Greater than V
Less than V
None of these
A child travelling in a train throws a ball outside with a speed V. According to a child who is standing on the ground, the speed of the ball is
Same as V
Greater than V
Less than V
None of these
