document.write( "Question 1206222: if you live 20 miles from work and have 15 minutes to get there and 2/3 of the trip is on the freeway. The other 1/3 is in residential with a max of 35mph. How fast would you need to drive on the freeway in order to make it on time? \n" ); document.write( "

Algebra.Com's Answer #843501 by ikleyn(52817) $\"\"$ $\"About$

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\n" ); document.write( "if you live 20 miles from work and have 15 minutes to get there and 2/3 of the trip
\n" ); document.write( "is on the freeway. The other 1/3 is in residential with a max of 35mph.
\n" ); document.write( "How fast would you need to drive on the freeway in order to make it on time?
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document.write( "The trip in residential area is 1/3 of 20 miles, i.e.   miles long.\r\n" );
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document.write( "The time spent on residential area is   =  =  =  hours.\r\n" );
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document.write( "The time remaining to drive on freeway is   =  =  hours,\r\n" );
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document.write( "where the fraction 1/4 represents 15 minutes, or one fourth of an hour.\r\n" );
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document.write( "The trip on the freeway is 2/3 of 20 miles, or   =  miles long.\r\n" );
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document.write( "So the speed on the freeway should be   =  = 8*28 = 224 miles per hour.\r\n" );
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document.write( "ANSWER.  The speed on freeway should be 224 miles per hour.\r\n" );
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\n" ); document.write( "\n" ); document.write( "Solved.\r
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\n" ); document.write( "\n" ); document.write( "Surely, this speed exceeds any possible limits, showing that the input numbers are not realistic.
\n" ); document.write( "But you have, from my post, the scheme (the algorithm) how to solve the problem for any other input data.\r
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\n" ); document.write( "\n" ); document.write( "The problem itself is good, since it teaches students to think in a flexible way.\r
\n" ); document.write( "\n" ); document.write( "The numbers are not very good and could be much better, had the problem's creator think/(take care) about it . . . \r
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