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The speed of a swimmer in still water is 20 m/s. The speed of river water is 10 m/s andis flowing due east. If he is standing on thesouth bank and wishes to cross the river alongthe shortest path, the angle at which he shouldmake his strokes w.r.t. north is given by :
  • a)
    30° west
  • b)
  • c)
    60° west
  • d)
    45° west
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
The speed of a swimmer in still water is 20 m/s. The speed of river wa...
VSR = 20m/s
VRG =  10m/s
sin θ = 10/20
sin θ = 1/2
θ = 300 west
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The speed of a swimmer in still water is 20 m/s. The speed of river wa...
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Community Answer
The speed of a swimmer in still water is 20 m/s. The speed of river wa...
To cross the river along the shortest path, the swimmer should aim to swim directly perpendicular to the river current. This means that the angle at which he should make his strokes with respect to north is 90 degrees.

Therefore, the correct answer is not given in the options provided.
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The speed of a swimmer in still water is 20 m/s. The speed of river water is 10 m/s andis flowing due east. If he is standing on thesouth bank and wishes to cross the river alongthe shortest path, the angle at which he shouldmake his strokes w.r.t. north is given by :a)30° westb)0°c)60° westd)45° westCorrect answer is option 'A'. Can you explain this answer?
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