SOLUTION: A boat travels between tho towns along a river. It travels 18 km upstream and back in a total time of 2 hours 10 minutes. Find the difference of the time taken to travel upstream a

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Question 1006499: A boat travels between tho towns along a river. It travels 18 km upstream and back in a total time of 2 hours 10 minutes. Find the difference of the time taken to travel upstream and downstream.
Answer by josgarithmetic(39613)   (Show Source): You can put this solution on YOUR website!
            rate          time          distance
up          r-c           18/(r-c)         18
down        r+c           18/(r+c)         18
Total


Time difference is .

Time sum


Average round trip:

Simplify this, and you can have the boat rate for still water (without river current).
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