A paddle boat can move at a speed of 12 km/h in still water. The boat is paddled 8 km downstream in a river in the same time it takes to go 4 km upstream. What is the speed of the river?
A paddle boat can move at a speed of 6km/h in still water. The boat is paddled 16 km downstream in a river in the same time it takes to go 8 km upstream.
