What is upstream

The speed of a boat in upstream is 2/3 that of downstream. Find the ratio of speed of boat in still water and to the average speed of boat in downstream and upstream?

A boat can go 30 km downstream and 24 km upstream in 2 hours 27 minutes. Also, it can go 10 km downstream and 4 km upstream in 37 minutes. What is the speed of the boat upstream (in km/h)?

A steamer goes downstream and covers the distance between two ports in 3 hours. It covers the same distance in 5 hours when it goes upstream. If the stream flows at 3 km/hr, then find what is the speed of the steamer upstream?

A boat goes 16km upstream and 24km downstream in 6hrs .Also it covers 12km upstream and 36km downstream in the same time.Find the speed of the boat upstream and downstream

In Lac operon this lies upstream to the operator region

In Lac operon this lies upstream to the operator region