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Math Help - I hate these problems

  1. #1
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    I hate these problems

    If it takes 7 women 3 hours to bake 24 dozen cookies, how long will it 2 women to bake 24 dozen cookies? Thanks Happy New Year! I can never remember how to solve these any help to remember is greatly appricated also. Thanks again
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  2. #2
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    If it takes 7 women 3 hours to bake 24 dozen cookies, how long will it 2 women to bake 24 dozen cookies?
    note that both jobs are the same.

    1 woman does 1/7 of the job in 3 hrs, which means it would take 1 woman 21 hrs to do the job.

    so, 2 women would take half that time ... 10.5 hrs
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  3. #3
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    Quote Originally Posted by algebraisabeast View Post
    If it takes 7 women 3 hours to bake 24 dozen cookies, how long will it 2 women to bake 24 dozen cookies? Thanks Happy New Year! I can never remember how to solve these any help to remember is greatly appricated also. Thanks again
    This is exactly the same type of problem as found here: http://www.mathhelpforum.com/math-he...m-solving.html
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  4. #4
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    Quote Originally Posted by skeeter View Post
    note that both jobs are the same.

    1 woman does 1/7 of the job in 3 hrs, which means it would take 1 woman 21 hrs to do the job.

    so, 2 women would take half that time ... 10.5 hrs
    Or, much the same thing: There are 2/7 as many women and this is an "inverse" variation- the more people, the shorter the time, so we divide by 2/7. 3 divided by 2/7 is 3 times 7/2= 21/2= 10.5 hours.
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