document.write( "Question 1193094: Mr. Downey can build a wall in 9 hours. His son Carl can build the same wall in 18 hours. Mr. Downey started to build the wall, worked for 3 hours, and then stopped working. How many hours would Carl require to complete the wall? \n" ); document.write( "

Algebra.Com's Answer #825069 by ikleyn(52908) $\"\"$ $\"About$

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\n" ); document.write( "Mr. Downey can build a wall in 9 hours. His son Carl can build the same wall in 18 hours.
\n" ); document.write( "Mr. Downey started to build the wall, worked for 3 hours, and then stopped working.
\n" ); document.write( "How many hours would Carl require to complete the wall?
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document.write( "Working for 3 hours, Mr. Downey completed 1/3 of the job; 2/3 of the job remained.\r\n" );
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document.write( "Hence, his son Carl needs 2/3 of 18 hours to complete the remaining job.\r\n" );
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document.write( "ANSWER.  Carl needs 12 hours to complete the job.\r\n" );
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