document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1130823>Question 1130823</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A motorboat takes 5 hours to travel 100 km going upstream. The return trip takes 2 hours going downstream. What is the rate of the boat in still water and what is the rate of the current? \r<BR>\n" );
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document.write( "Rate of the boat in still water:\r<BR>\n" );
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document.write( "Rate of the current: </SPAN>\n" );
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document.write( "A motorboat takes 5 hours to travel 100 km going upstream. The return trip takes 2 hours going downstream. What is the rate of the boat in still water and what is the rate of the current? \r<BR>\n" );
document.write( "\n" );
document.write( "Rate of the boat in still water:\r<BR>\n" );
document.write( "\n" );
document.write( "Rate of the current:<BR>\n" );
document.write( "<PRE STYLE=\"white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;\">Let boat speed, in still water, be S, and speed of current, C<BR>\n" );
document.write( "Then we get the following system of equations for the 2 speeds: <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=matrix%282%2C10%2C+S+-+C%2C+%22=%22%2C++100%2F5%2C+%22======%3E%22%2C+S+-+C%2C+%22=%22%2C+20%2C+%22------%22%2C+eq%2C+%22%28i%29%22%2C+S+%2B+C%2C+%22=%22%2C+100%2F2%2C+%22=====%3E%22%2C+S+%2B+C%2C+%22=%22%2C+50%2C+%22-----%22%2C+eq%2C+%22%28ii%29%22%29 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "2S = 70 ------- Adding eqs (ii) & (i)<BR>\n" );
document.write( "Speed of boat, or <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight_green%28matrix%281%2C6%2C+S%2C+%22=%22%2C+70%2F2%2C+%22=%22%2C+35%2C+mph%29%29 ALIGN=MIDDLE  ALT=\"highlight_green%28matrix%281%2C6%2C+S%2C+%22=%22%2C+70%2F2%2C+%22=%22%2C+35%2C+mph%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > <BR>\n" );
document.write( "Speed of current, or <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight_green%28matrix%281%2C6%2C+C%2C+%22=%22%2C+50+-+35%2C+%22=%22%2C+15%2C+mph%29%29 ALIGN=MIDDLE  ALT=\"highlight_green%28matrix%281%2C6%2C+C%2C+%22=%22%2C+50+-+35%2C+%22=%22%2C+15%2C+mph%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
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