document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=572856>Question 572856</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A car travels 400 miles on level terrain in the same amount of time it travels 160 miles on mountainous terrain. If the rate of the car is 30 miles per hour less in the mountains than on level ground, find its rate in the mountains. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #368528 by </B><A HREF=/tutors/aboutme.mpl?userid=mananth><B>mananth(16946)</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=368528\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Level		x	mph							<BR>\n" );
document.write( "Mountain		-30	slower	x		-30	mph			<BR>\n" );
document.write( "										<BR>\n" );
document.write( "Level		400	miles							<BR>\n" );
document.write( "Mountain		160	miles							<BR>\n" );
document.write( "Level	time	=	Mountain		time					<BR>\n" );
document.write( "t=d/r										<BR>\n" );
document.write( "400	/	x	=	160	/(	x		-30	)	<BR>\n" );
document.write( "cross multiply										<BR>\n" );
document.write( "400	(	x		-30	)	=	160	x		<BR>\n" );
document.write( "400	x	+	-12000	=	160	x				<BR>\n" );
document.write( "400	x	-	160	x	=	12000				<BR>\n" );
document.write( "400	x	=	12000							<BR>\n" );
document.write( "/	360									<BR>\n" );
document.write( "x	=	60      	mph	SPEED ON LEVEL		\r<BR>\n" );
document.write( "\n" );
document.write( "speed in mountains = 60-30 = 30 MPH				<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );