A swimmer can swim with a velocity of $v$ m/s in still water. He wants to cross a river of width $d$ meters flowing with a velocity $u$ m/s. If the swimmer heads in a direction making an angle $heta$ with the upstream direction such that he crosses the river in minimum time, what is the drift experienced by the swimmer?

A boat with a speed of $5$ km/h in still water crosses a river of width $1$ km along the shortest possible path in $15$ minutes. The velocity of the river water in km/h is

A motorboat going downstream overcomes a float at a point A. 60 minutes later it turns and after some time passes the float at a distance of 12 km from the point A. The velocity of the stream is (assuming constant velocity for the motorboat in still water):

A boat crosses a river of width $d$ flowing with speed $u$. The boat can travel with speed $v$ in still water. If the boat heads at an angle $heta$ with respect to the perpendicular to the river flow such that it reaches the directly opposite point on the other bank, the time taken to cross the river is:

A boatman can row with a speed of 10 km/h in still water. If the river flows steadily at 5 km/h, in which direction should he row in order to reach a point on the other bank directly opposite to the starting point? The width of the river is 2 km.

A swimmer wishes to cross a river of width $d$ flowing with a velocity $u$. The swimmer can swim with a velocity $v$ relative to still water. If the swimmer swims at an angle $heta$ with the upstream direction such that he drifts a minimum distance downstream, then $an heta$ is given by:

A boatman can row with a speed of $10$ km/h in still water. If the river flows steadily at $5$ km/h, in which direction should he row his boat in order to reach a point on the other bank directly opposite to the point from where he started? The width of the river is $2$ km.

A swimmer can swim with a velocity of $v$ m/s in still water. He wants to cross a river of width $d$ meters flowing with a velocity $u$ m/s. If the swimmer heads in a direction making an angle $heta$ with the upstream direction such that he crosses the river in minimum time, what is the drift experienced by the swimmer?

A boat capable of a speed $v$ in still water wants to cross a river of width $d$ flowing with speed $u$. If the boat crosses the river in minimum time, the drift along the river is:

A boat can travel with a speed of $v$ km/h in still water. It is pointed directly across a river flowing at $u$ km/h. If the width of the river is $d$ km, how far downstream from its intended landing point will the boat be carried?

A boat crosses a river of width 'w' from point A to point B, which is directly opposite A. The speed of the boat in still water is 'v' and the river flows with a constant speed 'u'. What is the minimum drift downstream if the boat takes a path at an angle θ to the line AB?