document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=884416>Question 884416</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Two cars move at a constant velocity in a straight line. If they move in opposite directions the cars will be 600m apart after 30s. If they move in the same direction they will be 25m apart after 25s. Calculate thier velocities in m/s. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #534376 by </B><A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><B>ankor@dixie-net.com(22740)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><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=ankor@dixie-net.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=534376\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  Two cars move at a constant velocity in a straight line.<BR>\n" );
document.write( " If they move in opposite directions the cars will be 600m apart after 30s.<BR>\n" );
document.write( " If they move in the same direction they will be 25m apart after 25s.<BR>\n" );
document.write( " Calculate their velocities in m/s.<BR>\n" );
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document.write( "let a = A car's velocity<BR>\n" );
document.write( "let b = B car's velocity<BR>\n" );
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document.write( "Write a distance equation for each scenario; dist = time * speec<BR>\n" );
document.write( "30(a+b) = 600, relative speed is the sum<BR>\n" );
document.write( "25(a-b) = 25, relative speed is the difference<BR>\n" );
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document.write( "Simplify both equations, divide the 1st by 30, the 2nd by 25 and you have<BR>\n" );
document.write( "a + b = 20<BR>\n" );
document.write( "a - b = 1<BR>\n" );
document.write( "---------------adding eliminates b, find a<BR>\n" );
document.write( "2a = 21<BR>\n" );
document.write( "a = 21/2<BR>\n" );
document.write( "a = 10.5 m/sec is A's velocity<BR>\n" );
document.write( "Find b<BR>\n" );
document.write( "b = 20 - 10.5<BR>\n" );
document.write( "b = 9.5 m/sec is B's velocity<BR>\n" );
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document.write( "You can confirm this by putting these values in both original equations<BR>\n" );
document.write( " </SPAN>\n" );
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