document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=331746>Question 331746</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A chemical mixing tank can be filled by two hoses. One requires 42 min to fill the tank , and the other 30 min . If both hoses are used, how much time is needed to fill the tank? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #237797 by </B><A HREF=/tutors/aboutme.mpl?userid=mananth><B>mananth(16949)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mananth><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=mananth><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=237797\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> one hose takes 42 minutes<BR>\n" );
document.write( "so it does 1/42 of the job in 1 minute.<BR>\n" );
document.write( "..<BR>\n" );
document.write( "the other fills in 30 minutes<BR>\n" );
document.write( "so it does 1/30 of the job in 1 minute<BR>\n" );
document.write( ".<BR>\n" );
document.write( "together they can do 1/30+1/42 of the job in 1 minute<BR>\n" );
document.write( "..<BR>\n" );
document.write( "30+42/ 32*40 of the job in 1 minute<BR>\n" );
document.write( "72/1280 <BR>\n" );
document.write( "So they will together fill the tank in 1280/72= 17.7 minutes<BR>\n" );
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