document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=767291>Question 767291</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Two airplanes working together can take the necessary photographs to map a certain region in 5 hours. After they had worked for 3 hours the first plane developed engine trouble and the second had to finish the job, requiring 4 1/2 hours of additional work. How long would it take each plane to do the job?  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #467545 by </B><A HREF=/tutors/aboutme.mpl?userid=dkppathak><B>dkppathak(439)</B></A><img src=\"/images/stars/stars-10.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=dkppathak><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=dkppathak><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=467545\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> let  airplane can take to complete the task  x hrs <BR>\n" );
document.write( "and other   can take y hrs<BR>\n" );
document.write( "first plane  hrs work=1/x<BR>\n" );
document.write( "second plane 1 hrs work =1/y<BR>\n" );
document.write( "both plane 1 hrs work =1/x +1/y<BR>\n" );
document.write( "both plane 3hrs work =3/x+3/y and work completed 3/5<BR>\n" );
document.write( "remaining work =1-3/5=2/5second has to finished the work in 9/2 hrs<BR>\n" );
document.write( "full work can be done by second plane  in 9/2x2/5=45 hrs<BR>\n" );
document.write( "full work can be done by first alone = 45/8 hrs  </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );