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Question

A task can be completed in 15 days when Akash and Bittu work together. Akash is 30% more efficient than Bittu. If both started the task separately and Akash stopped after working for 10 days, how many additional days would Bittu require to finish the remaining work?

A 12.5 days

B 11.5 days

C 18.5 days

D 16.5 days

E None of these

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