A boatman moves his boat with a velocity 'v' (relative to water) in river and finds to his surprise that velocity of river 'u' (with respect to ground) is more than 'v'. He has to reach a point directly opposite to the starting point on another bank by travelling minimum possible distance. Then

Options

A. he must steer the boat (with velocity v) at certain angle with river flow so that he can reach the opposite point on other bank directly.
B. his velocity 'v' must be towards directly opposite point, So, that he can travel rest of distance by walking on other bank to reach the directly opposite point.
C. boatman should maintain velocity v of boat at certain angle greater than `90^(@)` with direction of river flow to minimize drifting and then walk rest of distance on other bank.
D. boat velocity 'v' should be at an angle less than `90^(@)` with direction of river flow to minimize the drift and then walk to the point.

Answer

C