SOLUTION: Emma rows a boat downstream for 42 miles. The return trip upstream took 8 hours longer. If the current flows at 2 mph, how fast does Emma row in still water?

Algebra ->  Quadratic Equations and Parabolas -> SOLUTION: Emma rows a boat downstream for 42 miles. The return trip upstream took 8 hours longer. If the current flows at 2 mph, how fast does Emma row in still water?      Log On


   

Question 1193695: Emma rows a boat downstream for 42 miles. The return trip upstream took 8 hours longer. If the current flows at 2 mph, how fast does Emma row in still water?
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
            SPEEDS            TIMES               DISTANCE

DOWNSTR        r+2            42/(r+2)              42

UPSTRM         r-2            42/(r-2)              42

DIFF.                         8

This should be familiar for you by now, and you can decide what to do.