document.write( "Question 1173834: One printing press can print the first edition of a book in 55 min. A second printing press requires 66 min to print the same number of copies. How long would it take to print the first edition of the book with both presses operating? \n" ); document.write( "

Algebra.Com's Answer #799161 by ikleyn(52787) $\"\"$ $\"About$

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document.write( "The combined rate of work is   +   of the job per minute\r\n" );
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document.write( "     +   =  =  =  = .\r\n" );
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document.write( "Hence, the entire job will be completed in 30 minutes, with both machines working together.    ANSWER\r\n" );
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