document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1154015>Question 1154015</A>: <I><SPAN STYLE=\"word-break: break-all;\"> It takes a boat 2 hours to travel 28 miles downstream and 4 hours to travel 24 miles upstream. \r<BR>\n" );
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document.write( "What is the speed of the boat in still water? <BR>\n" );
document.write( "The boat travels at_____ miles per hour in still water. \r<BR>\n" );
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document.write( "What is the speed of the current of the river? <BR>\n" );
document.write( "The speed of the current is ____miles per hour. </SPAN>\n" );
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document.write( "Use the given data to find the downstream and upstream speeds:<br><BR>\n" );
document.write( "downstream: 28/2 = 14mph<BR>\n" );
document.write( "upstream: 24/4 = 6mph<br><BR>\n" );
document.write( "The 14mph is the speed of the current added to the speed of the boat; the 6mph is the speed of the current subtracted from the speed of the boat.<br><BR>\n" );
document.write( "Logically, that means the speed of the boat is halfway between the 14mph and the 6mph.<br><BR>\n" );
document.write( "So the boat's speed is 10mph; and that makes the speed of the current 4mph.<br><BR>\n" );
document.write( "ANSWERS:<BR>\n" );
document.write( "boat speed: 10mph<BR>\n" );
document.write( "current speed: 4mph<br><BR>\n" );
document.write( "There are a great number of different kinds of problems where you end up with this kind of situation -- the sum of two numbers is A and the difference of those two numbers is B.<br><BR>\n" );
document.write( "In any situation like that, one of the numbers is the average of A and B; and then the other number is the difference between that average and either of A or B.<br><BR>\n" );
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