Question

22 A and B separately can do a piece of work in 36 days and 20 days respectively.
Both started together. After 9 days Cjoined them and whole work was com-
pleted in 12 days. In how many days can Calone do the same piece of work?
1) 48
2) 60
3) 42
4) 45

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Answer 1

Answer:

i think 3)42 ok

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