Physics - Kinematics Question with Solution | TestHub

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.

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.

boatman should be mantain velocity v of boat at certain angle greater than $90^{\circ }$ with direction of river flow to minimize drifting & than walk rest of distance on other bank.

boat velocity ' $v$ ' should be at an angle less than $90^{\circ }$ with direction of river flow to minimize the drift and then walk to the point.