SOLUTION: Fernandos's motorboat can travel 30mi/h in still water. if the boat can travel 9 miles downstram in the same time it takes to travel 1 mile upstream what is the rate of the river's

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Question 346415: Fernandos's motorboat can travel 30mi/h in still water. if the boat can travel 9 miles downstram in the same time it takes to travel 1 mile upstream what is the rate of the river's current?
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
time = distance / rate

9 / (30 + c) = 1 / (30 - c)