Amir takes 5 hours to do a job. If Chani helps him they complete the job in 3 hours. How many hours would it take Chani to do the same job if she were working alone?
Added by Sharon B.
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We can do this by dividing the total work by the number of hours it takes him to complete the job alone. In this case, the total work is 1 job and it takes Amir 5 hours to complete it. So, Amir can do 1/5 of the job in one hour. Show more…
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