SOLUTION: The speed of a stream is 5mph. A boat travels 8 miles upstream in the same time it takes to travel 18 miles downstream. What is the speed of the boat in still water?

Question 909135: The speed of a stream is 5mph. A boat travels 8 miles upstream in the same time it takes to travel 18 miles downstream. What is the speed of the boat in still water?
Answer by clearblueskai(22) (Show Source): You can put this solution on YOUR website!
x - speed of the boat in still water
x-5 - speed of the boat upstream
x+5 - speed of the boat downstream

Downstream:

since time is the same,
Upstream:

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