SOLUTION: The speed of a stream is 6mph. If a boat travels 60 miles downstream in the same time that it takes to travel 30 miles upstream, what is the speed of the boat in still water?

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Question 83053: The speed of a stream is 6mph. If a boat travels 60 miles downstream in the same time that it takes to travel 30 miles upstream, what is the speed of the boat in still water?
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
let b=(boat in still water) ... speed downstream is twice speed upstream, so b+6=2(b-6) ... b+6=2b-12 ... 18=b