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Arithmetic Aptitude :: Time and Work

  1. A and B complete a work in 6 days. A alone can do it in 10 days. If both together can do the work in how many days?
  2. A.
    3.75 days
    B.
    4 days
    C.
    5 days
    D.
    6 days

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  3. A and B together can do a piece of work in 8 days. If A alone can do the same work in 12 days, then B alone can do the same work in?
  4. A.
    20 days
    B.
    16 days
    C.
    24 days
    D.
    28 days

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  5. A can do a piece of work in 4 days. B can do it in 5 days. With the assistance of C they completed the work in 2 days. Find in how many days can C alone do it?
  6. A.
    10 days
    B.
    20 days
    C.
    5 days
    D.
    4 days

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  7. A and B can do a piece of work in 6 2/3 days and 5 days respectively. They work together for 2 days and then A leaves. In how many days after that B will complete the work alone.
  8. A.
    2 days
    B.
    1 ½ days
    C.
    3 days
    D.
    3 ½ days

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  9. A can do a piece of work in 30 days. He works at it for 5 days and then B finishes it in 20 days. In what time can A and B together it?
  10. A.
    16 2/3 days
    B.
    13 1/3 days
    C.
    17 1/3 days
    D.
    16 1/2 days

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  11. A and B can do a piece of work in 12 days and 16 days respectively. Both work for 3 days and then A goes away. Find how long will B take to complete the remaining work?
  12. A.
    15 days
    B.
    12 days
    C.
    10 days
    D.
    9 days

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  13. A and B can do a piece of work in 3 days, B and C in 4 days, C and A in 6 days. How long will C take to do it?
  14. A.
    18 days
    B.
    20 days
    C.
    24 days
    D.
    30 days

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  15. A can do a piece of work in 10 days. He works at it for 4 days and then B finishes it in 9 days. In how many days can A and B together finish the work?
  16. A.
    6 days
    B.
    8 days
    C.
    8 ½ days
    D.
    7 ½ days

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  17. A can do a piece of work in 40 days; B can do the same in 30 days. A started alone but left the work after 10 days, then B worked at it for 10 days. C finished the remaining work in 10 days. C alone can do the whole work in?
  18. A.
    24 days
    B.
    30 days
    C.
    44 days
    D.
    17 1/2 days

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  19. A work which could be finished in 9 days was finished 3 days earlier after 10 more men joined. The number of men employed was?
  20. A.
    18
    B.
    20
    C.
    22
    D.
    24

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