SOLUTION: Sarah 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 Sarah row in still water?

Question 1029728: Sarah 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 Sarah row in still water?
Answer by josgarithmetic(39616) (Show Source): You can put this solution on YOUR website!
Travel rates rule to relate the quantities, RT=D

                    RATE        TIME          DISTANCE
 
downstream          r+2           t            42

upstream            r-2          t+8           42

Form the system of equations and solve for r.
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