Mrs. Crowley has a stack of letters to be typed. If she can type all of the letters in 6 h

Anonymous
timer Asked: Apr 29th, 2015

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Mrs. Crowley has a stack of letters to be typed. If she can type all of the letters in 6 hours and Mr. crowley can type all the letters in 9 hours how long will it take it them if they work together?


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