SOLUTION: A and B can do a peice of work in 8 days whih A alone can take 12 days, how many days will B work alone?

Question 999059: A and B can do a peice of work in 8 days whih A alone can take 12 days, how many days will B work alone?
Found 2 solutions by Alan3354, ikleyn:
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
A and B can do a peice of work in 8 days whih A alone can take 12 days, how many days will B work alone?
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Use part of the job per day:
A does the job in 12 days --> 1/12 job per day.
B does 1/B job per day.
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1/12 + 1/B = 1/8 job/day
1/B = 1/8 - 1/12 = 1/24
B takes 24 days
Answer by ikleyn(52872) (Show Source): You can put this solution on YOUR website!
.
- = - = .

Answer. In 24 days.

is the rate of work for A+B working together.

is the rate of work for A working alone.

The difference is the rate of work for B working alone.

See the lesson Using fractions to solve word problems on joint work in this site. You will find the solutions of the typical word problems on joint work.

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