document.write( "Question 1113673: A crew of four practices by rowing up a river for a fixed distance and then returning to their starting point. The river has a current of 3km/h.
\n" ); document.write( "(A) Currently the crew can row 15km/h in still water. If it takes them 25 minutes to make the round-trip, how far upstream did they row?
\n" ); document.write( "(B) After some additional practice the crew cuts the round-trip time to 23 minutes. What is their still-water speed now? Round answers to one decimal place. \n" ); document.write( "

Algebra.Com's Answer #728754 by ikleyn(52786) $\"\"$ $\"About$

You can put this solution on YOUR website!
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document.write( "Time equation is \r\n" );
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document.write( "a)   =  +     (<<<---===  = 25 minutes = 25/60 of an hour)\r\n" );
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document.write( "     =   ==== Multiply by 36 both sides  ====> \r\n" );
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document.write( "    2L + 3L = 5*3\r\n" );
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document.write( "    5L = 15  ====>  L =  = 3 km.\r\n" );
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document.write( "Answer.  One way distance is 3 miles.\r\n" );
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document.write( "Check.    =  =  =    ! Correct !\r\n" );
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\n" ); document.write( "\n" ); document.write( "Solve   b)   following the same scheme/method.\r
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\n" ); document.write( "\n" ); document.write( "--------------
\n" ); document.write( "It is a typical and standard Upstream and Downstream round trip word problem.\r
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\n" ); document.write( "\n" ); document.write( "You can find many similar fully solved problems on upstream and downstream round trips with detailed solutions in lessons \r
\n" ); document.write( "\n" ); document.write( "    - Wind and Current problems \r
\n" ); document.write( "\n" ); document.write( "    - More problems on upstream and downstream round trips \r
\n" ); document.write( "\n" ); document.write( "    - Wind and Current problems solvable by quadratic equations \r
\n" ); document.write( "\n" ); document.write( "    - Unpowered raft floating downstream along a river\r
\n" ); document.write( "\n" ); document.write( "    - Selected problems from the archive on the boat floating Upstream and Downstream \r
\n" ); document.write( "\n" ); document.write( "in this site.\r
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\n" ); document.write( "\n" ); document.write( "Read them attentively and learn how to solve this type of problems once and for all.\r
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\n" ); document.write( "\n" ); document.write( "Also, you have this free of charge online textbook in ALGEBRA-I in this site\r
\n" ); document.write( "\n" ); document.write( "    - ALGEBRA-I - YOUR ONLINE TEXTBOOK.\r
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\n" ); document.write( "\n" ); document.write( "The referred lessons are the part of this textbook under the section \"Word problems\", the topic \"Travel and Distance problems\".\r
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\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Save the link to this online textbook together with its description\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Free of charge online textbook in ALGEBRA-I
\n" ); document.write( "https://www.algebra.com/algebra/homework/quadratic/lessons/ALGEBRA-I-YOUR-ONLINE-TEXTBOOK.lesson\r
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\n" ); document.write( "\n" ); document.write( "to your archive and use it when it is needed.\r
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