document.write( "Question 486302: It takes 3 city snowplows 14 hours to clear 500 miles of road. If the city wants the 500 miles of road to be cleared in 6 hours, how many additional snowplows must they buy? \n" ); document.write( "
Algebra.Com's Answer #332426 by Edwin McCravy(20060)\"\" \"About 
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It takes 3 city snowplows 14 hours to clear 500 miles of road. If the city wants the 500 miles of road to be cleared in 6 hours, how many additional snowplows must they buy?
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document.write( "The least common multiple of 14 hours and 6 hours is 42 hours.\r\n" );
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document.write( "It takes 3 city snowplows 14 hours\r\n" );
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document.write( "It takes 1 city snowplow 3 times as long or 42 hours\r\n" );
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document.write( "6 hours is 1/7th as long as that. \r\n" );
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document.write( "The city wants it done 7 times as fast as one snowplow can do it.\r\n" );
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document.write( "So it need 7 snowplows.  It now has 3, so it needs 4 additional snowplows.\r\n" );
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document.write( "Or you can use the formula:\r\n" );
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document.write( "\"%28W%5B1%5DT%5B1%5D%29%2FJ%5B1%5D+=+%28W%5B2%5DT%5B2%5D%29%2FJ%5B2%5D\"\r\n" );
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document.write( "where \r\n" );
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document.write( "W1 = the number of workers (or machines) in the first situation.\r\n" );
document.write( "T1 = the number of time units (hous, days, etc) in the first situation.\r\n" );
document.write( "J1 = the number of jobs to be done in the first situation.\r\n" );
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document.write( "W2 = the number of workers (or machines) in the second situation.\r\n" );
document.write( "T2 = the number of time units (hous, days, etc) in the second situation.\r\n" );
document.write( "J2 = the number of jobs to be done in the second situation.\r\n" );
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document.write( "In this problem\r\n" );
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document.write( "W1 = 3, T1 = 14, J1 = 1,\r\n" );
document.write( "W2 = ???, T2 = 6, J2 = 1.\r\n" );
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document.write( "\"%283%2A14%29%2F1+=+%28W%5B2%5D6%29%2F1\"\r\n" );
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document.write( "42 = 6W2\r\n" );
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document.write( " 7 = W2\r\n" );
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document.write( "So it would take 7 snowplows, and since they have 3, they need 4 more.\r\n" );
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document.write( "Edwin
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