The speed of a swimmer is `4kmh^(-1)` in still water.If the swimmer makes his strokes normal to the flow of river of width `1km`,he reaches a point `750m` down the stream on the opposite bank. The speed of the river water is _____ `km h^-1`

The river flows at 4 km/h. A boat can go downstream thrice as fast as upstream The speed of boat in still water is

A man can swim at a speed 2ms^(-1) in still water. He starts swimming in a river at an angle 150^(@) with direction of flow of water and reaches at the exactly oppsite point on the opposite bank. (a) Find the speed of flowing water. (b) If width of river is 1 km then calculate the time taken also

The speed of boat is 5 kmh^(-1) in still water. It crosses a river of width 1 km along the shortest possible path in 15 min. Then, velocity of river will be

A boat which has a speed of 6km/h in still water crosses a river of width 1 km along the shortest possible path in 20 min. the velocity of the river water in km/h is

If the speed of a swimmer in still water is 9 km/h. Find the down stream speed of the swimmer,whenthe river is flowing with the speed of 6 km/h.

A man can swim with a speed of 4kmh^(-1) in still water. He crosses a river 1km wise that flows steadly at 3kmh^(-1) . If he makes his strokes normal to the river current, how far down the river does he go when he reaches the other bank?

A boat man can rown with a speed of 10 km h^(-1) in still water. If the river flows steadily at 5 km //h , in which direction showld the boatman row in order to reach a point on the other bank directly opposite to the point from wher he stared ? The width of the river is 2km .

A boat crosses a river of width 1 km by shortest path in 15 min. if the speed of boat in still water is 5 kmh^(-1) , then what is the speed of the river?

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 :