SOLUTION: If a boat travels upstream from point A to point B in 2 ½ hours and returns downstream from point B to point A in 2 hours, find the speed of the boat (on its speedometer) if the c

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Question 1184990: If a boat travels upstream from point A to point B in 2 ½ hours and returns downstream from point B to point A in 2 hours, find the speed of the boat (on its speedometer) if the current is 3 miles per hour.

Answer by josgarithmetic(39613) About Me  (Show Source):
You can put this solution on YOUR website!
          SPEED        TIME        DISTANCE

UP         r-3          2.5          d

DOWN       r+3          2            d

Same distance each way.
2.5%28r-3%29=2%28r%2B3%29
Simplify and solve.