Asked by Dusty

Manuel has a boat that can move at a speed of 30 kn/h in still water. He rides 280 km downstream in a river in the same time it takes to ride 70 km upstream. What is the speed of the river?
Answered by Rhawni.
8u=3u+35

You are solving equations with Variables on Both Sides.
Answered by PsyDAG
Let R = speed of river

Distance = rate * time

Therefore time = Distance/rate

280/(30+R) = 70/(30-R)

Solve for R.


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