a can do a work in 20 days and b in 50 days if they work on it togethe | Examsbook

433

Q:
A can do a work in 20 days and B in 50 days. If they work on it together for 5 days, then what fraction of work is left?

1
1/6
2
2/9
3
13/20
4
1/3

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Answer : 3. "13/20 "

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