A, B and C can complete a piece of work in 18, 4 and 12 days respectively. Working together, they will complete the same work in
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A, B and C can complete a piece of work in 18, 4 and 12 days respectively
So in 1 day
A=1/18
B=1/4
C=1/12
Working together in 1 day
1/18+1/4+1/12=14/36
=7/18
They will complete total work in
18/7 days
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