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A swimmer swins in still water at a spee...

A swimmer swins in still water at a speed `=5 km//hr`. He enters a `200m` wide river, having river flow speed `=4km//hr` at point `A` and proceeds to swim at an angle of `127^(@) (sin 37^(@) = 0.6)` with the river flow direction. Another point `B` is located directly across `A` on the other side. the swimmer lands on the other bank at a point `C`, form which he walks the distance `CB` with a speed `= 3km//hr`. The total time in which he reaces from `A` to `B` is

A

5 minutes

B

4 minutes

C

3 minutes

D

none

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The correct Answer is:
B
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