document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=539707>Question 539707</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A boat travels 3km upstream and 3km back. the time for the round trip is 10 hours. the speed of the stream is 5km/hr whats the speed of the boat in still water? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #353543 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=353543\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Boat speed		x   		<BR>\n" );
document.write( "current speed 		5		<BR>\n" );
document.write( "				<BR>\n" );
document.write( "against current x-		5	kph	<BR>\n" );
document.write( "with current x+		5	kph	<BR>\n" );
document.write( "				<BR>\n" );
document.write( "Distance= 	3	km		<BR>\n" );
document.write( "				<BR>\n" );
document.write( "Time against + time with  = 			10	hours<BR>\n" );
document.write( "t=d/r				\r<BR>\n" );
document.write( "\n" );
document.write( "3	/(	x   	+	5	)	+	3	/(x	-	5	)	=	10				<BR>\n" );
document.write( "																	<BR>\n" );
document.write( "LCD =	(x	-	5	)	(	x   	+	5	)								<BR>\n" );
document.write( "3	*(	x   	-	5	)	+	3	(x	+	5	)	=	10				<BR>\n" );
document.write( "3	x   	-	15	+	3	x   	+	15		=	10	(	x ^2		-	25	)<BR>\n" );
document.write( "6	x   	=	10	x ^2	-	250											<BR>\n" );
document.write( "10	x ^2	-	-6	x   	-	250											<BR>\n" );
document.write( "																	<BR>\n" );
document.write( "Find the roots of the equation by quadratic formula																	<BR>\n" );
document.write( "																	<BR>\n" );
document.write( "a=	10	,	b=	-6	,	c=	-250										<BR>\n" );
document.write( "																	<BR>\n" );
document.write( "b^2-4ac=	36	+	10000														<BR>\n" );
document.write( "b^2-4ac=	10036		<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%09sqrt%28%0910036%09%29=%09100.18%09 ALIGN=MIDDLE  ALT=\"%09sqrt%28%0910036%09%29=%09100.18%09\"   DISABLED_style= \"max-width:90%; height:auto;\" >									<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x=%28-b%2B-sqrt%28b%5E2-4ac%29%29%2F%282a%29 ALIGN=MIDDLE  ALT=\"x=%28-b%2B-sqrt%28b%5E2-4ac%29%29%2F%282a%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >																	<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x1=%28-b%2Bsqrt%28b%5E2-4ac%29%29%2F%282a%29 ALIGN=MIDDLE  ALT=\"x1=%28-b%2Bsqrt%28b%5E2-4ac%29%29%2F%282a%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >																	<BR>\n" );
document.write( "x1=(	6	+	100.18	)/	20												<BR>\n" );
document.write( "x1=	5.31																<BR>\n" );
document.write( "x2=(	6	-100.18	) /	20													<BR>\n" );
document.write( "x2= 	-4.71																<BR>\n" );
document.write( "Ignore negative value		<BR>\n" );
document.write( "Boat speed = 5.31 mph	\r<BR>\n" );
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document.write( "ma.ananth@hotmail.ca														<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );