Questions
A river is flowing from W to E with a speed of 5 m/min, A man can swim in still water with a velocity 10 m/min. In which direction should the man swim so as to take the shortest possible path to go to the south.
detailed solution
Correct option is C
For shortest possible path man should swim with an angle (90+θ) with downstream.From the figure sinθ=vrvm=510=12⇒∴θ=300 So angle with downstream = 900+300=1200Talk to our academic expert!
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A body which has a speed of 5km/hr in still water crosses a river of width 1km along the shortest possible path in 15minutes. The velocity of the river water in km/hr is
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