A paddle boat can move at a speed of 14 ​km/h in still water. The boat is paddled 4 km downstream in a river in the same time it takes to go 2 km upstream. What is the speed of the​ river?

Respuesta :

1.20/(14+x) =10/(14-x)    2.20(14-x)=10/(14+x) 3.280-20x=140+10x 4.140=30x 5.x=14/3
Q&A Education