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A can do a piece of work in 80 days. A works for 10 days, then B complete the remaining work in 42 days. In how many days will (A + B) do this work together

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The correct Answer is:
30 days
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ADVANCED MATHS BY ABHINAY MATHS ENGLISH-TIME & WORK -QUESTIONS
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  2. A work for 2 days, then B complete the remaining work in 9 days. If A ...

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  3. A can do a piece of work in 80 days. A works for 10 days, then B compl...

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  4. A and B can do a piece of work in 45 and 40 days respectively. They...

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  5. A and B can do a piece of work in 20 days and 30 days respectively. A ...

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  6. A and B can do a piece of work in 20 days and 25 days. A start the wor...

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  7. A, B and C can do a piece of work in 12, 15 and 20 days. How much mini...

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  8. A, B and C can do a piece of work in 10, 20 and 25 days. How much mini...

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  9. A and B can do a work in 20 days and 30 days respectively. A and B wor...

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  10. (A + B) can do a work in 6 days. (A + B + C) can do the same work in 5...

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  11. A takes 27 days more than (A + B) together to complete a work. B takes...

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  12. A takes 4(1)/(2) days more than (A + B) together to complete a work. B...

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  13. A takes 5(1)/(3) days more than (A + B) together to complete a work. ...

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  14. A takes 7 days more than B and 16 days more than C to complete a work....

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  15. A takes 24 days more than B and 32 days more than C to complete a work...

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  16. A takes 5 days more than B and 9 days more than C to complete a work. ...

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  17. A takes 6 hours more than (A + B + C) together to complete a work. B t...

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  18. A and B together can do a piece of work in 12 days. While B and C toge...

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  19. (A + B) together can do a piece of work in 12 days. While (B + C) toge...

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  20. A takes as much time as B and C together to complete a work. While A a...

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