A boat crosses a river of width 1 km by shortest path in 15 min. if the speed of boat in still water is 5 `kmh^(-1)`, then what is the speed of the river?

A man travels by boat 36 km down a river and back in 8 hours. If the speed of his boat in still water is 12 km/hr, find the speed of the river current.

A man travels by boat 36 km down a river and back in 8 hours. If the speed of his boat in still water is 12 km/hr, find the speed of the river current.

Pratik travels by boat 36 km down a river and back in 8 hours. If the speed of his boat in still water is 12 km/hr, find the speed of the river current.

Pratik travels by boat 36 km down a river and back in 8 hours. If the speed of his boat in still water is 12km/hr, find the speed of the river current.

A boat crosses river of width 60sqrt(7)m inshortest possible path.Speed of river is 8m/s and speed of the boat in , still water is 6m/s .Find the time taken by boat(in seconds) to cross the river.

A boat can travel 15 km downstream in 18 min. The ratio of the speed of the boat in still water to the speed of the stream is 4 : 1 . How much time will the boat take to cover 10 km upstream ?