document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=258414>Question 258414</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Hello, This comes from Algebra and Trigonometry 4th edition book.I can't figure the formula needed when I don't have the speed of something already.\r<BR>\n" );
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document.write( "A Leisure Time Cruise riverboat travels 46 km downstream in 2 hr. It travels 51 km upstream in 3 hr. Find the speed of the boat and the speed of the plane. \r<BR>\n" );
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document.write( "Thank you for your help! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #190228 by </B><A HREF=/tutors/aboutme.mpl?userid=richwmiller><B>richwmiller(17219)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=richwmiller><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/cgi-bin/show-face.mpl?user=richwmiller><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=190228\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> speed * time =distance<BR>\n" );
document.write( "also written as r*t=d<BR>\n" );
document.write( "We know the time and the distance<BR>\n" );
document.write( "Surely, if I told you that I went 60 miles in one hour you would say  that I went 60 mph.<BR>\n" );
document.write( "x*1=60<BR>\n" );
document.write( "x=60<BR>\n" );
document.write( "or if I told you that I went 120 miles in 2 hours you would know I went 60 mph.\r<BR>\n" );
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document.write( "x*2=120<BR>\n" );
document.write( "x=60 again\r<BR>\n" );
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document.write( "But something is wrong with your problem.<BR>\n" );
document.write( "It says\"Find the speed of the boat and the speed of the plane. \"<BR>\n" );
document.write( "There is no plane mentioned.<BR>\n" );
document.write( "r*2=46<BR>\n" );
document.write( "r=? You can solve this!<BR>\n" );
document.write( "and the other <BR>\n" );
document.write( "r*3=51<BR>\n" );
document.write( "r=51/3=?\r<BR>\n" );
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document.write( "so it should current not plane the current is 3 <BR>\n" );
document.write( "20+3=23<BR>\n" );
document.write( "20-3=17<BR>\n" );
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