can finish a piece or work in 15 days, B and 'C' in 20 days while ' and C in A days.How long will they take to finish it together? How long will each take to finish the work (13 ⅓,40,24,120)
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can finish a piece or work in 15 days, B and 'C' in 20 days while ' and C in A days.How long will they take to finish it together? How long will each take to finish the work (13 ⅓,40,24,120)
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