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Question

Working individually, 'A' can finish 60% of a task in 18 days, and 'B' takes 15 days longer than 'A' to complete the entire task. However, 'B' and 'C' working together can complete the task in 20 days. Now, What will be the amount of time 'C' would need to complete the same task when working alone.

A 39 days

B 16 days

C 36 days

D 26 days

E none of these

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