note that both jobs are the same.If it takes 7 women 3 hours to bake 24 dozen cookies, how long will it 2 women to bake 24 dozen cookies?

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