document.write( "Question 720815: Don Williams uses his small motorboat to go 4 miles upstream to his favorite fishing spot. Against the current, the trip takes 2/5 hours. With the current the trip takes 1/5. How fast can the boat travel in still water. What is the speed of the current?? thanks. \n" ); document.write( "

Algebra.Com's Answer #441987 by Alan3354(69443) $\"\"$ $\"About$

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Don Williams uses his small motorboat to go 4 miles upstream to his favorite fishing spot. Against the current, the trip takes 2/5 hours. With the current the trip takes 1/5. How fast can the boat travel in still water. What is the speed of the current??
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\n" ); document.write( "1 ? is sufficient.
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\n" ); document.write( "Find the speed upstream and downstream using d = r*t.
\n" ); document.write( "How fast can the boat travel in still water. (A ? would be good there.)
\n" ); document.write( "It's the average of the speed upstream and downstream.
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\n" ); document.write( "The speed of the current (called the current) is the difference between the waterspeed and the groundspeed.
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\n" ); document.write( "This problem has been posted and solved 1000's of times on this site. Look it up.
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