document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1025688>Question 1025688</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The distance between two piers on a river is 43.2 miles. It takes a motorboat, moving downriver, 2 hr 24 min to complete the journey. How much time does it take the same boat to go back upstream if the current flows at 1.8 mph? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #641010 by </B><A HREF=/tutors/aboutme.mpl?userid=lwsshak3><B>lwsshak3(11628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=lwsshak3><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=641010\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The distance between two piers on a river is 43.2 miles. It takes a motorboat, moving downriver, 2 hr 24 min to complete the journey. How much time does it take the same boat to go back upstream if the current flows at 1.8 mph?<BR>\n" );
document.write( "2 hr 24 min=2.4 hrs<BR>\n" );
document.write( "let x=speed of motorboat in still water\r<BR>\n" );
document.write( "\n" );
document.write( " speed=distance/travel time=43.2/2.4=18 mi/hr(speed downstream)<BR>\n" );
document.write( "x+1.8=18<BR>\n" );
document.write( "x=16.2 mph(speed of motorboat in still water)<BR>\n" );
document.write( "16.2-1.8=14.4 mph(speed upstream)<BR>\n" );
document.write( "43.2/14.4=9 hrs<BR>\n" );
document.write( " How much time does it take the same boat to go back upstream? 9 hrs </SPAN>\n" );
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