A, B and C do a job alone in 20, 30 and 60 days respectively. In how many days can A do the job if he is assisted by B and C in every third day?

1. A, B and C do a job alone in 20, 30 and 60 days respectively. In how many days can A do the job if he is assisted by B and C in every third day?

[BB Assistant Director-2013 : 2013]

Answer

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