13. A and B can do a job in 6 days, B and C in 9 days, and A and C in 12 days. How much time
will they take to complete the job if they all work together? How long will each of them take
to do the job?
answer it fast and properly
don't give wrong answers....
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Answer:
A+B=6 days
A+C=12 days
A+B+C = 18 DAYS
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