document.write( "Question 1198409: A Photo scanner (A) can scan all the pictures in 2 hours and 15 minutes. Together, scanner (A) and scanner (B) can do the same work for 1 hour and 9 minutes.\r
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\n" ); document.write( "b. How much faster does it get the work done? \n" ); document.write( "

Algebra.Com's Answer #832001 by ikleyn(52871) $\"\"$ $\"About$

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\n" ); document.write( "A Photo scanner (A) can scan all the pictures in 2 hours and 15 minutes.
\n" ); document.write( "Together, scanner (A) and scanner (B) can do the same work for 1 hour and 9 minutes.
\n" ); document.write( "a. Which scanner is more effective?
\n" ); document.write( "b. How much faster does it get the work done?
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document.write( "The rate of work of scanner (A) is    a job per minute,\r\n" );
document.write( "    or 0.007407407 a job per minute.\r\n" );
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document.write( "The combined rate of work is   a job per minute, \r\n" );
document.write( "    or  0.014492754 a job per minute.\r\n" );
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document.write( "Hence, rate of job of  scanner (B) is  0.014492754 - 0.007407407 = 0.007085347 a job per minute.\r\n" );
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document.write( "Thus we see that the scanner (A) is more effective: its rate of work is higher.\r\n" );
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document.write( "Scanner (A) is   = 1.04545437 = 1.045 (rounded) times as fast as scanner (B).\r\n" );
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\n" ); document.write( "\n" ); document.write( "On the way, you learned a conception \" rate of work \",
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