SOLUTION: A boat traveled 210 miles downstream and back. The trip downstream took 10 hours. The trip back took 70 hours. What is the speed of the boat in still water? What is the speed of t

Algebra ->  Equations -> SOLUTION: A boat traveled 210 miles downstream and back. The trip downstream took 10 hours. The trip back took 70 hours. What is the speed of the boat in still water? What is the speed of t      Log On


   



Question 717975: A boat traveled 210 miles downstream and back. The trip downstream took 10 hours. The trip back
took 70 hours. What is the speed of the boat in still water? What is the speed of the current?

Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
A boat traveled 210 miles downstream and back. The trip downstream took 10 hours. The trip back
took 70 hours. What is the speed of the boat in still water? What is the speed of the current?
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Find the 2 speeds, d/stream and u/stream
Use d = r*t
r = d/t
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The boat's speed is the average of the 2 speeds.
The current is the difference is boat speed and either of the others.