A boat takes 9 h to travel a distance upstream and takes 3 h to travel the same distance downstream. If the speed of the boat in still water is 4 km/h, then what is the velocity of the stream?

A boat takes 6 hours less to travel a distance downstream than to travel the same distance upstream. If the speed of the boat in still water is 9 km/hr and speed of stream is 3 km/hr. Find the total distance covered by the boat.

A boat takes 90 minutes less to travel 36 miles downstream than to travel the same distance upstream. If the speed of the boat in still water is 10 mph, the speed of the stream is –

A motor boat takes 2 hours to travel a distance of 9 km downstream and it takes 6 hours to travel the same distance against the current. The speed of the boat is still water and that of the current (in km/h) respectively are :

A motor boat takes 2 hours to travel a distance of 9 km downstream and it takes 6 hours tomtravel the same distance against the current.The speed of the boat in still water and that of the current (in km/h) respectively are:

A boat goes 20 km downstream in 1 h and the same distance upstream in 2h. The speed of the boat in still water is-