Question 443762: It takes Joann 8 hours to do the job alone. Joann and Paulette working together takes 6 hours to do the job. How long will it take Paulette working alone? Give answer in hours and minutes. Answer by rwm(914) (Show Source):
It should be obvious that Paulette isn't much help and takes considerably longer to do the job alone since the time was only shortened by 2 hours.
another way to look at
Joan does 1/8 of the job every hour
so in 6 hours she has done 6/8 of the job
which leaves 2/8 for Paulette
so in 6 hours Paulette has done