document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=109325>Question 109325</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Question #1:<BR>\n" );
document.write( "A motorboat can move at a speed of 18 km/h in still water. The boat travels 105 km downstream in a river in the same time it takes to go 75 km upstream. What is the speed(or current) of the river?\r<BR>\n" );
document.write( "\n" );
document.write( "Question #2:<BR>\n" );
document.write( "A small water pipe takes twice as long to fill a tank as does a larger water pipe. With both pipes open, it takes 16 h to fill the tank. Find the time it would take the small pipe working alone to fill the tank. <BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #79703 by </B><A HREF=/tutors/aboutme.mpl?userid=checkley71><B>checkley71(8403)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=checkley71><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=79703\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 1) 105/(18+x)=75/(18-x) now cross multiply<BR>\n" );
document.write( "75(18+x)=105(18-x)<BR>\n" );
document.write( "1350+75x=1890-105x<BR>\n" );
document.write( "75x+105x=1890-1350<BR>\n" );
document.write( "180x=540<BR>\n" );
document.write( "x=540/180<BR>\n" );
document.write( "x=3 kh. is the speed of the current.<BR>\n" );
document.write( "2) x*2x/(x+2x)=16<BR>\n" );
document.write( "2x*2/3x=16 now cross multiply<BR>\n" );
document.write( "16*3x=2x^2<BR>\n" );
document.write( "2x^2-48x=0<BR>\n" );
document.write( "2x(x-24)=0<BR>\n" );
document.write( "x=24 hours for the larger pipe to fill the tank.<BR>\n" );
document.write( "2*24=48 hours for the smaller pipe.<BR>\n" );
document.write( "proof<BR>\n" );
document.write( "24*48/(24+48)=16<BR>\n" );
document.write( "1152/72=16<BR>\n" );
document.write( "72*16=1152<BR>\n" );
document.write( "1152=1152<BR>\n" );
document.write( " \r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );