The stream of a river is flowing with a speed of 2km h ^ - 1 . A swimmer can swim at a speed of 4km h ^ - 1 . The direction of the swimmer with respect to the flow of the river, to cross the river straight, is

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Quantrex Academy · Accepted Answer

Correct answer: C. 120 °

To reach the point directly opposite to the starting point, the resultant velocity of swimmer should be as shown in figure.

The stream of a river is flowing with a speed of 2km h ^ - 1 . A swimmer can swim at a speed of 4km h ^ - 1 . The

The stream of a river is flowing with a speed of 2km h ^ - 1 . A swimmer can swim at a speed of 4km h ^ - 1 . The

From figure

sin \theta = \dfrac{2}{4} = \dfrac{1}{2}

\theta = 30 °

Angle with flow

= 90 ° + 30 ° = 120 °

The stream of a river is flowing with a speed of 2km h ^ - 1 . A...

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