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ONE CHALLENGE QUESTION EVERY DAY

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CAT 16-1: The work done by 2 orcs in a day is equal to the work done by 3 elves in a day. The work done by 3 orcs in a day is equal to the work done by 1 hobbit in a day. It takes 10 days for an orc, a hobbit and an elve to complete a job working together. How many days will 3 hobbits working together take to complete triple the same job if while working together with hobbits, the efficiency of a hobbit goes down by 20%. Write your answer in days.