document.write( "Question 1145633: Betty and Chris have a system of walking and jogging equal distances through a course in their neighbourhood. They walk at a rate of 6km/h and jog at a rate of 12km/h The total time required for them to walk and jog through the course is 2h How long is the course? \n" ); document.write( "

Algebra.Com's Answer #766857 by ikleyn(52797) $\"\"$ $\"About$

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document.write( "Let  \"d\"  be the walking distance, in kilometers (the same as jogging distance (!) ).\r\n" );
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document.write( "Then the time walking is   hours, while the time jogging is   hours.\r\n" );
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document.write( "Total time is 2 hours\r\n" );
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document.write( "     +  = 2   hours.\r\n" );
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document.write( "It is your basic equation.  (Also called \"time\" equation)\r\n" );
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document.write( "At this point, the setup is completed.\r\n" );
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document.write( "To solve the equation, multiply both sides by 12\r\n" );
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document.write( "    2d + d = 2*12\r\n" );
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document.write( "    3d     = 24\r\n" );
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document.write( "     d     = 24/3 = 8 kilometers.\r\n" );
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document.write( "Distance walking = distance jogging = 8 kilometers.\r\n" );
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document.write( "The course is  8 + 8 = 16 kilometers long.    ANSWER\r\n" );
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\n" ); document.write( "\n" ); document.write( "Using \"time\" equation is the STANDARD method of solving such problems.\r
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\n" ); document.write( "\n" ); document.write( "From my post, learn on how to write, how to use and how to solve a \"time\" equation.\r
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\n" ); document.write( "\n" ); document.write( "To see many other similar solved problems, look into the lessons\r
\n" ); document.write( "\n" ); document.write( "    - Had a car move faster it would arrive sooner\r
\n" ); document.write( "\n" ); document.write( "    - How far do you live from school? \r
\n" ); document.write( "\n" ); document.write( "    - Earthquake waves \r
\n" ); document.write( "\n" ); document.write( "    - Time equation: HOW TO use, HOW TO write and HOW TO solve it \r
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