Algebra.Com's Answer #763820 by ikleyn(52830)![\"\"](\"/images/stars/stars-13.gif\")  
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document.write( "Let d be the distance between the two airports (in miles).\r\n" );
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document.write( "Flying at the speed of 540 mph, the airplane spends  hours and arrives 8 minutes later.\r\n" );
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document.write( "Flying at the speed of 480 mph, the airplane spends  hours and arrives 53 minutes later.\r\n" );
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document.write( "The difference of times is - hours.\r\n" );
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document.write( "From the other side, this difference is 53-8 = 45 minutes =  of an hour =  of an hour.\r\n" );
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document.write( "It gives you the \"time\" equation\r\n" );
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document.write( " - = .\r\n" );
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document.write( "At this point, the setup is just completed.\r\n" );
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document.write( "To find \"d\", multiply both sides of the equation (1) by 60. You will get\r\n" );
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document.write( "  -  = 45.\r\n" );
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document.write( "One more time, multiply both sides of the last equation by 72. You will get\r\n" );
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document.write( " 9d - 8d = 72*45,\r\n" );
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document.write( " d = 3240\r\n" );
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document.write( "ANSWER. The distance between the two airports is 3240 miles.\r\n" );
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document.write( "CHECK.  = 6.75 hours; \r\n" );
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document.write( " = 6 hours.\r\n" );
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document.write( " The difference is 0.75 of an hour = of an hour -- ! Correct !\r\n" );
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document.write( "Using \"time\" equation is the STANDARD method of solving such problems.\r
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document.write( "It is simple, logical, straightforward and economic. Going in this way, you will not make a mistake - the logic of the method
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document.write( "prevents you of making mistakes.\r
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document.write( "From this lesson, learn on how to write, how to use and how to solve a \"time\" equation.\r
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document.write( "To see many other similar solved problems, look into the lessons\r
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document.write( " - Had a car move faster it would arrive sooner\r
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document.write( " - How far do you live from school? (*)\r
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document.write( " - Earthquake waves \r
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document.write( " - Time equation: HOW TO use, HOW TO write and HOW TO solve it \r
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document.write( "in this site.\r
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document.write( "For the TWIN problem, see the lesson (*) in the list.\r
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