document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1196948>Question 1196948</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A ship traveling east at 30 mph is 10 mi from a harbor when another ship leaves the harbor traveling east at 40 mph. How long does it take the second ship to catch up to the first ship?<BR>\n" );
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document.write( "The distance the second ship needs to make up is 10 miles; the rate of catching up is the difference between the two speeds, which is 40-30 = 10mph.<br><BR>\n" );
document.write( "I assume you are familiar with the basic formula<br><BR>\n" );
document.write( "time = distance / rate<br><BR>\n" );
document.write( "It is similarly true that<br><BR>\n" );
document.write( "time = (difference in distances) / (difference in rates)<br><BR>\n" );
document.write( "So the number of hours required for the second ship to catch up to the first is 10/10 = 1.<br><BR>\n" );
document.write( "ANSWER: 1 hour<br><BR>\n" );
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