A and B together can do a piece of work in 12 days, B and C
together in 15 days and C and A together in 20 days. In how
many days, can A, B and C together do it ?
(a) 5 days
(b) 10 days
(c) 24 days
(d) 30 days
- 2 Answers
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Answer / beda
2(A+B+C)=1/12 + 1/15 +1/20=1/5 ( in one day)
(A +B +C) = 1/10 in one day
Therefore A +B +C can complete in 10 days
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