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 #822829 by greenestamps(13200)![]() ![]() You can put this solution on YOUR website! \n" ); document.write( "Another mental solution that gives you good mental exercise.... \n" ); document.write( "Since Fred takes 1/3 as long as John to do the job, when they work together Fred does 3/4 of the work while John does 1/4. \n" ); document.write( "Since it take them 1 1/2 hours to do the job together, that means Fred does 3/4 of the job in 1 1/2 hours; and that means it would take him 4/3 times 1 1/2 hours, or 2 hours, to do the job alone. \n" ); document.write( "ANSWER: 2 hours \n" ); document.write( " \n" ); document.write( " |