Boats and streams? practice with me

A boatman takes twice as long to row a distance against the stream as to row the same distance with the stream.Find the ratio of speeds of the boat in still water and the stream.

A man takes twice as long to row a distance against the stream as to row the same distance in favour of the stream. The ratio of the speed of the boat (in still water) and the stream is :

A man takes twice as long to row a distance against the stream as to row the same distance in favour of the stream. The ratio of the speed of the boat (in still water) and the stream is