# intermediate algebra

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Rowing. Abby rows 10km. upstream and 10km. back in a total time of three hours. The speed of the river is 5km./h. Find Abby's speed in still water.

• intermediate algebra -

I just answered a very similar question here:

http://www.jiskha.com/display.cgi?id=1312332711

Study the solution and see if you can apply it to your question.

• intermediate algebra -

Also I just noticed that the same question was answered here:
http://www.jiskha.com/display.cgi?id=1312075836

All you have to do is solve the equation at the end.

• intermediate algebra -

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