A can complete a work in 10 days, B can ...

A can complete a work in 10 days, B can complete the same work in 20 days and C in 40 days. A starts working on the first day, Bworks for second day and Cworks for third day. Again A works for fourth day and B for fifth day and so on. If they continued working in the same way, in how many days will the work be completed?

A

15 days

B

16.5 days

C

15.5 days

D

17 days

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The correct Answer is:

B

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