A and B can do a work in 12 days. B and C can do it is 15 days, and A and C can do it in 20 days. If all of them work together, in how many days they can finish the work?
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Job Solution Combined Bank (সমন্বিত ব্যাংক) Sonali, Janata & Agrani Bank Offier (Cash Recruitment) 22.02.2008 গণিত
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