document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=757534>Question 757534</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A car completes the first part i.e. 50 kms of its journey in 90 minutes. If it has to complete the whole journey with an average speed of 50 km/hr then how much time, it will take to complete the second part i.e. 70 kms of its journey? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #460867 by </B><A HREF=/tutors/aboutme.mpl?userid=sachi><B>sachi(548)</B></A><img src=\"/images/stars/stars-10.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=sachi><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=sachi><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=460867\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> let it take t hr to complete the second part i.e. 70 kms of its journey<BR>\n" );
document.write( "so the total length of the journey=50+70=120 km<BR>\n" );
document.write( "& total time=90/60+t=1.5+t hr<BR>\n" );
document.write( "so the average speed=120/(1.5+t)<BR>\n" );
document.write( "but 120/(1.5+t)=50<BR>\n" );
document.write( "or 1.5+t=120/50=2.4<BR>\n" );
document.write( "or t=2.4-1.5=0.9hr=54 mins<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );