A girl standing at point P on a beach wishes to reach a point Q in the sea as quickly as possible. She can run at `6 km h^(-1)` on the beach and swim at `4 km h^(-1)` in the sea. She should take the path

A man starting from point P cross a 4km wide lagoon and reaches point Q in the shortest possible time by the path shown in the figure. If the person swims at a speed of 3km//hr and walks at a speed of 4km//hr, then find his time fo journey (in minutes). .

A man starting from point P cross a 4km wide lagoon and reaches point Q in the shortest possible time by the path shown in the figure. If the person swims at a speed of 3km//hr and walks at a speed of 4km//hr, then find his time fo journey (in minutes). .

Inthe figure shown a river of width 4km is flowing with the speed of 5km/h. A swimmer whose swimming speed relative to the water is 4km/h, starts swimming from a points on a bank. On the other bank 5 is a point which is directly opposite to A. What minimum distance (in km) the swimmer will have to walk on the other bank to reach the point B.

A river is flowing at a speed of 5 km/h in a particular direction. A man, who can swim at a speed of 20 km/h in still water, starts swimming along the direction of flow of the river from point A and reaches another point B which is at a distance of 30 km from the starting point A. On reaching point B, the man turns back and starts swimming against the direction of flow of the river and stops after reaching point A. The total time taken by the man to complete his journey is

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

Two village women are returning home starting from the same point . The first woman walks 1 km South , then turns to her right and walks 6 km to reach her house . In the meanwhile the sescond woman walks 5 km West , then she turns North and 4 km , then she turns to her left and walks 1 km to reach her hosue . Where is the second woman's house with respect to the first woman's house ?

Mr X runs a marathon starting from the point A he runs 5 km towards north and reach point B, then turns right runs 6 km reach point C, then turn right runs 8 km and reach point D, then turns right runs 10 km and reach point E, then turns right runs 6 km and reach point F, then turns right runs 1 km and reach point G, then turn rights runs 3 km and reach point H. The shortest distance between point D and G is ?

Shabnam takes 20 minutes to reach her school if she goes at a speed of 6 km/h. If she wants to reach school in 24 minutes, what should be her speed?

A man can swim at the rate of 5 km h^-1 in still water. A 1 - km wide river flows at the rate of 3 km h^-1 The man wishes to swim across the river directly opposite to the starting point. (a) Along what direction must the man swim ? (b) What should be his resultant velocity ? ( c) How much time will he take to cross the river ?

A man can swim at the rate of 5 km h^-1 in still water. A 1 - km wide river flows at the rate of 3 km h^-1 The man wishes to swim across the river directly opposite to the starting point. (a) Along what direction must the man swim ? (b) What should be his resultant velocity ? ( c) How much time will he take to cross the river ?