document.write( "Question 1191073: Fred can seal asphalt driveway in 1/3 the time it takes John. Working together, it takes them 1 1/2 hours. How long would it have taken Fred working alone?
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Algebra.Com's Answer #822824 by ikleyn(52788)\"\" \"About 
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\n" ); document.write( "Fred can seal asphalt driveway in 1/3 the time it takes John.
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\n" ); document.write( "\n" ); document.write( "            This problem can be solved  MENTALLY,  without using equation,\r
\n" ); document.write( "\n" ); document.write( "            by applying reasoning and common sense.\r
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document.write( "The problem says that Fred works as productive, as 3 instanses of John.\r\n" );
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document.write( "Next, the problem says that working together, they complete the job in 1.5 hours.\r\n" );
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document.write( "It is the same as to say that 4 instances of John will complete the job in 1.5 hours.\r\n" );
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document.write( "Hence, John alone will do the job in 4*1.5 = 6 hours.\r\n" );
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document.write( "It implies that Fred, working 3 times as fast as John, will complete the job in 6:3 = 2 hours.    ANSWER\r\n" );
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