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

A boat which has a speed of 5 km/hr in still water crosses a river of width 1 km along the shortest possible path in 15 minutes. The velocity of the river water in km/hr is

A boat which has a speed of 5 km// hr in steel water crosses a river of width 1 km along the shortest possible path in 15 minutes . The velocity of the river water in km// hr is

A boat which has a speed of 5 km// hr in steel water crosses a river of width 1 km along the shortest possible path in 15 minutes . The velocity of the river water in km// hr is

A boat which has a speed of 5 km// hr in steel water crosses a river of width 1 km along the shortest possible path in 15 minutes . The velocity of the river water in km// hr is

The speed of a boat is 5 km/h in still-water. It crosses a river of width 1 km along the shortest path in 20 min. The velocity of river water in km/h is