A man can row a boat with 4km/h in still water, if he is crossing a river where the current is 2 km/h.
(a) In what direction will his boat be holded, if he wants to reach a point on the other bank, directly opposite to starting point?
(b) If width of the river 4km, how long will the man take to cross the river, with the condition in part (a)?
(c) In what direction shou ld he heat the boat if he wants to cross the river in shorest time and what is this minimum time?
(d) How long will it take him to row 2 km up the stream and then back to his starting point?

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 .

47.A man can row a boat with 4kmph in still water.If he is crossing a river where the current is 8kmph .The time take to cross the river in shortest path is (k)/(sqrt(3))hr .Where k ' is (width of the river is 8km )

A man can row a boat at 4.0km/hr in still water. A river flows at 2.0km/hr. (a) if he is crossing the river, in what direction the oat shou ld go to reach a point directly opposite to his staring point? (b) if the river is 4.0km wide how long will it take him to cross the river? (c) How long will it take him to row 2.0km down the river and then back to his starting point? (d) How long will it take him to row 2.0 km up the river and then back to his starting point? (e) in what direction the boat shou ld go, if he wants to cross he river in teh smallest possible time?

A man can row a boat with 8 kmph in still water.If he is crossing a river of width 8km where the current is 4kmph , then the time taken to cross the river in shortest time is (k/sqrt(3)) hr.The value of 'k' is?

A man can row a boat in still water with a velocity of 8 kmph .Water is flowing in a river with a velocity of 4 kmph . At what angle should he row the boat so as to reach the exact opposite point

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

A boat can be rowed at 5 m/s on still water. It is used to cross a 200m wide river from the south bank to the north bank. The river current has uniform velocity of 3 m/s due east. (a) In which direction must it be steered to cross the river perpendicular to current ? (b) How long will it take to cross the river in a direction perpendicular to the river flow ? (c) In which direction must the boat be steered to cross the river in minimum time ? How far will it drift ?

A man can swim in still water with speed v . He wants to cross a river of width d that flows with speed u and reaches the point directely opposite to his starting point. (a) In which direction should he try to swim (i.e., find the angle the makes with the river flow)? (b) much time will he take to cross the river ?

A river flows with a speed more than the maximum speed with which a person can swim in still water. He intends to cross the river by the shortest possible path (i.e., he wants to reach the point on the opposite bank which directly opposite to the starting point). Which of the following is correct ?