document.write( "Question 86514: A plane took 1 hour longer to travel 560 miles on the first portion of a flight than it took to fly 480 miles on the second portion. If the speed was the same for each portion, what was the flying time for the second part of the trip?
\n" ); document.write( "A)8 hours
\n" ); document.write( "B)7 hours
\n" ); document.write( "C)5 hours
\n" ); document.write( "D) 6 hours \n" ); document.write( "

Algebra.Com's Answer #62584 by Edwin McCravy(20056) $\"\"$ $\"About$

You can put this solution on YOUR website!
A plane took 1 hour longer to travel 560 miles on the first portion of a flight than it took to fly 480 miles on the second portion. If the speed was the same for each portion, what was the flying time for the second part of the trip?\r
\n" ); document.write( "\n" ); document.write( "A)8 hours
\n" ); document.write( "B)7 hours
\n" ); document.write( "C)5 hours
\n" ); document.write( "D) 6 hours
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\r\n" );
document.write( "Make this chart.\r\n" );
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document.write( "                     |  DISTANCE |    RATE   |  TIME  |\r\n" );
document.write( "1st portion of trip  |           |           |        |\r\n" );
document.write( "2nd portion of trip  |           |           |        |\r\n" );
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document.write( "Let t = the flying time for the second part of the trip.\r\n" );
document.write( "So fill in \"t\" for the time for the 2nd portion:\r\n" );
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document.write( "                     |  DISTANCE |    RATE   |  TIME  |\r\n" );
document.write( "1st portion of trip  |           |           |        |\r\n" );
document.write( "2nd portion of trip  |           |           |    t   |\r\n" );
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document.write( "Now read this:\r\n" );
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document.write( ">>...took 1 hour longer.....on the first portion\r\n" );
document.write( "of a flight than it took.....on the second \r\n" );
document.write( "portion...<<\r\n" );
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document.write( "So we fill in t+1 for the time of the first portion.\r\n" );
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document.write( "                     |  DISTANCE |    RATE   |  TIME  |\r\n" );
document.write( "1st portion of trip  |           |           |   t+1  |\r\n" );
document.write( "2nd portion of trip  |           |           |    t   |\r\n" );
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document.write( "Now read this:\r\n" );
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document.write( ">>...560 miles on the first portion.....480 miles on the \r\n" );
document.write( "second portion...<< \r\n" );
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document.write( "Now fill in those two distances:\r\n" );
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document.write( "                     |  DISTANCE |    RATE   |  TIME  |\r\n" );
document.write( "1st portion of trip  |     560   |           |   t+1  |\r\n" );
document.write( "2nd portion of trip  |     480   |           |    t   |\r\n" );
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document.write( "Now use  to fill in the rates:\r\n" );
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document.write( "                     |  DISTANCE |    RATE   |  TIME  |\r\n" );
document.write( "1st portion of trip  |     560   |       |   t+1  |\r\n" );
document.write( "2nd portion of trip  |     480   |        |    t   |\r\n" );
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document.write( "Now that we have the chart all filled in, we look for what\r\n" );
document.write( "we haven't used. That is this:\r\n" );
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document.write( ">>...the speed was the same for each portion...<<\r\n" );
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document.write( "So we set two rates (speeds) equal:\r\n" );
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document.write( " = \r\n" );
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document.write( "Can you solve that?  Answer t = 6 hours \r\n" );
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document.write( "Edwin

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