document.write( "Question 1189402: Machine A can do a job alone in 10 hours. Machine B can do the same job alone in 12 hours. Machine A is turned on at 6am Machine B is turned on at 9 a.m. Machine A breaks down at 10 a.m., and Machine B must finish the job alone. When will Machine B finish? \n" ); document.write( "

Algebra.Com's Answer #820756 by ikleyn(52781) $\"\"$ $\"About$

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document.write( "Machine A worked 4 hours and completed 4/10 of the job.  6/10 of the job left.\r\n" );
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document.write( "Machine B completed remaining 6/10 of the job  in   =  = 7.2  hours = 7 hours and 12 minutes.\r\n" );
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document.write( "Since machine B started at 9 am, it completed the job at 4:12 pm.    ANSWER\r\n" );
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