A person swims at `135^(@)` to current to river, to meet target on reaching opposite point.The ratio of person's velocity to river water velocity is

Velocity of water in a river is

A person reaches on a point directly opposite on the other bank of a river.The velocity of the water in the river is 4 m//s and the velocity of the person in still water is 5 m//s .If the width of the river is 84.6m , time taken to cross the river in seconds is

Two persons P and Q crosses the river starting the point A on one side to exactly opposite point B on the other bank of the river. The person P crosses the river in the shortest path. The person Q crosses the river in shortest time and walks back to point B .Velocity of river is 3 kmph and speed of each person is 5kmph w.r.t river. If the two persons reach the point B in the same time, then the speed of walk of Q is .

A swimmer wands to cross a river and reach point B directly from A . The speed of the wimmer in still river and that of river flow are same. The dotted line AN is normal to flow direction of river. For swimmer to reach point B , the angle his velocity relative to river will make with line AN is given by theta . then the value of theta is :

Why is it easier to swim in sea water than in the river water ?

A man can swim with a certain speed, in still water to cross a river to a point directly opposite to the starting point in time t_(0) . When the river flows, he crosses the river directly along the same path in a time t_(1) , If 'd' be the river width, Then the velocity of water current is:

The ratio of downstream drift of a person in crossing a river making same angles with downstream and upstream are respectively 2 : 1. The ratio of the speed of river u and the swimming speed of person v is: