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Question

'A' and 'B' can complete a piece of work in 10 days, 'B' and 'C' can complete the work in 16 days, and 'A' and 'C' can complete the work in 20 days. Find the time taken by 'B' to complete 50% of the work. (Answer should be rounded off to the nearest integer)

A 10 days

B 13 days

C 12 days

D 9 days

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