The efficiencies of A, B, and C are in the ratio 2 : 5 : 3. Working together, they can complete a task in 12 days. In how many days can A alone complete 30% of that task?
One day work =2d + 5d + 3d = 10d
So , 12 days of work = 120 days.
30% of work = 36d
A can complete it in 36d/2d = 18 days.
So, the answer would be option d)18 days.
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