document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1024835>Question 1024835</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Problem 9\r<BR>\n" );
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document.write( "Ali will take the <BR>\n" );
document.write( ":11:41 AM<BR>\n" );
document.write( " train to San Diego. The train is estimated to arrive in San Diego in <BR>\n" );
document.write( "3<BR>\n" );
document.write( " hours <BR>\n" );
document.write( "39<BR>\n" );
document.write( " minutes. What is the estimated arrival time?<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #640237 by </B><A HREF=/tutors/aboutme.mpl?userid=Theo><B>Theo(13342)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Theo><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=Theo><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=640237\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> the train leaves at 11:41 am.\r<BR>\n" );
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document.write( "the train take 3 hours and 39 minutes.\r<BR>\n" );
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document.write( "the time of departure is 11 hours and 41 minutes in 24 hour time.\r<BR>\n" );
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document.write( "you want to add 3 hours and 39 minutes to 11 hours and 41 minutes.\r<BR>\n" );
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document.write( "do the minutes and the hours separately.\r<BR>\n" );
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document.write( "you get a total of 14 hours and 80 minutes.\r<BR>\n" );
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document.write( "since 80 minutes is equivalent to 1 hour and 20 minutes, then you want to take away 60 from the minutes part of the answer and add 1 to the hours part of the answer.\r<BR>\n" );
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document.write( "you get a total of 15 hours and 20 minutes.\r<BR>\n" );
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document.write( "that's in 24 hour time.\r<BR>\n" );
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document.write( "to convert from 24 hour time to 12 hour time, you need to subtract 12 hours from the 24 hour time if the 24 hour time is greater than 12 - otherwise you just leave it as is.\r<BR>\n" );
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document.write( "therefore 15 hours and 20 minutes in 24 hour time is equal to 3 hours and 20 minutes in 12 hour pm time.\r<BR>\n" );
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document.write( "the pm hours become 15 - 12 = 3.\r<BR>\n" );
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document.write( "the pm time becomes 3 hours and 20 minutes.\r<BR>\n" );
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document.write( "this is shown as 3:20 pm.\r<BR>\n" );
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document.write( "the train leaves at 11:41 am.<BR>\n" );
document.write( "the train arrives at 3:20 pm.\r<BR>\n" );
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document.write( "to calculate the time it took, convert the 12 hour time to 24 hour time.\r<BR>\n" );
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document.write( "the 12 hour am time is still 11:41 - no adjustment necessary there.\r<BR>\n" );
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document.write( "the 12 hour pm time is 3:20 plus 12 = 15:20 in 24 hour time.\r<BR>\n" );
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document.write( "now you want to subtract 11:41 from 15:20.\r<BR>\n" );
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document.write( "you are subtracting 3 hours and 41 minutes from 15 hours and 20 minutes.\r<BR>\n" );
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document.write( "take 1 away form the hours time and add 60 to the minutes time  of 15:20 to get 14 hours and 80 minutes.\r<BR>\n" );
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document.write( "now you can subtract 11 hours and 41 minutes from 14 hours and 80 minutes.\r<BR>\n" );
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document.write( "11:41 is the departure time in 24 hour time.<BR>\n" );
document.write( "14:80 is the arrival time in 24 hour time, after the adjustment.\r<BR>\n" );
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document.write( "subtract 41 minutes from 80 minutes to get 39 minutes.\r<BR>\n" );
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document.write( "subtract 11 hours from 14 hours to get 3 hours.\r<BR>\n" );
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document.write( "the time it took is 3 hours and 39 minutes.\r<BR>\n" );
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document.write( "this corresponds to the number of hours and minutes it took from the problem statement so the solution can be determined to be correct.\r<BR>\n" );
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document.write( "your solution is that the train arrives at 3:20 pm.\r<BR>\n" );
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document.write( "note:\r<BR>\n" );
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document.write( "12 hour time is broken up into two segments of 12 hours each.<BR>\n" );
document.write( "the first segment is am time.<BR>\n" );
document.write( "the second secoment is pm time.\r<BR>\n" );
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document.write( "24 hour time take the whole day as 24 hours rather than two segments of 12 hours apiece.\r<BR>\n" );
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document.write( "most clocks show 12 hour time.<BR>\n" );
document.write( "you have to know whether it's am or pm in order to correctly read the clock.\r<BR>\n" );
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document.write( "to convert from 12 hour time to 24 hour time, you add 12 to the pm time.\r<BR>\n" );
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document.write( "to convert from 24 hour time to 12 hour time, you subtract 12 from the 24 hour time, only if the 24 hour time is greater than 12.\r<BR>\n" );
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document.write( "some examples.\r<BR>\n" );
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document.write( "9:00 am is equal to 9:00 in 24 hour time.<BR>\n" );
document.write( "9:00 pm is equal to 9 + 12 = 21:00 in 24 hour time.\r<BR>\n" );
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document.write( "23:45 in 24 hour time is equal to 23 - 12 = 11:45 in 12 hour time.\r<BR>\n" );
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document.write( "when adding and subtracting minutes, you do the hours and minutes separately.\r<BR>\n" );
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document.write( "if the number of minutes you are subtracting is greater than the number of minutes you are subtracting form, then you need to borrow 1 from the hours and add 60 to the minutes.\r<BR>\n" );
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document.write( "this is the same as i did above.\r<BR>\n" );
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