A river is flowing with a speed of `1 km h^-1` A swimmer wants to go point `C` starting from `A`. He swims with a speed of `5 km h^-1` at an angle `theta` w.r.t. the river flow. If `AB = BC = 400 m`, at what angle with the river bank should the swimmer swim ?
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The stream of a river is flowing with a speed of 2 km/h. A swimmer can swim at a speed of 4 km/h. What should be the direction of the swimmer with respect to the flow of the river to cross the river straight?

A river is flowing due east with a speed 3ms^(-1) . A swimmer can swim in still water at a speed of 4ms^(-1) . If swimmer starts swimming due north, then the resultant velocity of the swimmer is

A man wishes to cross a river flowing with velocity u swims at an angle theta with the river flow.If the man swims with speed v and if the width of the river is d , then the drift travelled by him is

A swimmer can swim in still water with a speed of 2.5 m/s. What is the shortest time taken by him to swim across the river?

A river is flowing from west to east with a speed 5 m s^(-1) . A swimmer can swim in still water at a speed of 10 m s^(-1) . If he wants to start from point A on south bank and reach opposite point B on north bank. In what direction direction should he swim ?

A river is flowing steradily with a speed 5 km h^(-1) . A boat man can row with a speed of 10 km h^(-1) in still water. He rows his boat in river at right angles to the bank of river, If width of river is 800 m , (i) how much time the boat man will take to cross the river ? (ii) How far away from a point just opposite to the bank of river he will be reaching there ? (ii) What will be his effective speed gt

A swimmer swims with a speed of 10 m/s at angle of 120^0 from direction of river flow. Find velocity of river flow such that swimmer reach exactly opposite point of bank.

A man can swim at a speed of 3 km h^-1 in still water. He wants to cross a 500-m wide river flowing at 2 km h^-1 . He keeps himself always at an angle to 120^@ with the river flow while swimming. The time taken to cross the river is.

A river is flowing at the rate of 6 km/hr. A swimmer swims across with a velocity of 9 km/hr w.r.t. water. The resultant velocity of the man will be in (km/hr):-