on a particular day, raindrops are falling vertically at a speed of 5m/s. a man holding a plastic board is running to escape from rain. the lower end of board makes 45 degree angle with the horizontal and is at a height equal to half that of man . the maximum speed of the man so that his feet do not get wet is ___?

The maximum speed of the man should be
tan 450=v5v=5 m/s

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