plzzzzzzzzzz solve it
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1/A+1/B+1/C=1/4
=1/12+1/18+1/C= 1/4
By solving it ,we get
1/C=4/36
then, C alone can do work in 9 days
=1/12+1/18+1/C= 1/4
By solving it ,we get
1/C=4/36
then, C alone can do work in 9 days
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