document.write( "Question 906942: One clerk can file 12 folders per minute and a second clerk, 9. How long will it take them working together to file 672 folders? \n" ); document.write( "

Algebra.Com's Answer #550157 by MathTherapy(10552) $\"\"$ $\"About$

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\n" ); document.write( "One clerk can file 12 folders per minute and a second clerk, 9. How long will it take them working together to file 672 folders?
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document.write( "Both file 9 + 12, or 21 folders in 1 minute
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document.write( "Then, with T being time taken, by both, to file 672, we form a proportion to get:
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document.write( "21T = 672 ------- Cross-multiplying
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document.write( "T, or time taken = , or  minutes \n" );
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