A river is flowing from west to east at a speed of 5 m/s. A man on the south bank of the river capable of swimming it 10 m/s in still water is to swim across the river in shortest path. The direction which he should swim is

Options

A. `120^(@)` opposite to the direction of flow of river
B. `120^(@)` with the direction of flow of river
C. `60^(@)` with the direction of flow of river
D. perpendicular to the flow of the river

Answer

B