A man must get from point A on one bank of a river to point B on the other bank moving along the straight line AB (fig.4) . The width of the river AC = 1 km, the distance BC=2 km ., the maximum speed of the boat relative v = 2 km/hr . The distance AB is covered in 30 minutes

Two swimmers start at the same time from point A one bank of a river to reach point B on the other bank, lying directly oppostie to point A. one of them crosses the river along the straight line AB, while the other swims at right angles to the stream and then walks the distance, which he has been carried awayby the stream to get to point B. Both swimmers reach point B at the same time. what was the velocity (assumed uniform) of his walking if velocity of both the swimmers in still water is 2.5 km h^(-1) and the stream velocity is 2 km h^(-1) ?

Two swimmers leave point A on one bank of the river to reach point B lying right across on the other bank. One of them crosses the river along the straight line AB while the other swims at right angles to the stream and them walks the distance that he has been carried by the stream to get to point B . what was the velocity v_(0) of his walking if both swimmers reach the destination simultaneously? The stream velocity is u and v is the velocity of swimmer in still water.

Two swimmers leave point A on the bank of the river to reach point B lying right across on the other bank. One of them crosses the river along the straight line AB while the other swims at right angles to the stream and then walks the distance that he has been carried away by the stream to get to point B. What was the velocity u of his walking if both swimmers reached the destination simultaneously? The stream velocity v_0=2.0 km//hour and the velocity v^' of each swimmer with respect to water equals to 2.5km per hour.

A man in a row boat must get from point A to point B on the opposite bank of the river (see figure).The distance BC=a .The width of the river AC=b .At what minimum speed u relative to the still water should the boat travel to reach the point B ?The velocity of flow of the river is v_(0)

A man can swim in still water t a rate of 4 km/hr. The width of the river is 1 km. how long will he take to cross the river straight, if the speed of the current is 3 km/hr? 10 m in b. 20 m in c. 15 m in d. 18 m in

A man swimming in a river from a point. A on one bank has to reach a point C on other bank, which is at a distance l from the point B, directly opposite to A on other bank. River width is d and the current velocity is u_(0) . Find the minimum speed of swimmer relative to still water with which he should swim.

A launch plies between two points A and B on the opposite banks of a river always following the line AB. The distance S between points and B is 1200 m. The velocity of the river current v= 1.9 m//s is constant over the entire width of the river. The line AB makes an angle alpha= 60^@ with the direction of the current. With what velocity u and at what angle beta to the line AB should the launch move to cover the distance AB and back in a time t= 5 min ? The angle beta remains the same during the passage from A to B and from B to A.

A man can swim in still water at a speed of 6 kmph and he has to cross the river and reach just opposite point on the other bank.If the river is flowing at a speed of 3 kmph ,and the width of the river is 2km , the time taken to cross the river is (in hours)