A alone can do 2/5 of a work in 12 days, B is 25 percent more efficient than A. C alone can do t

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A alone can do 2/5 of a work in 12 days, B is 25 percent more efficient than A. C alone can do t

A alone can do 2/5 of a work in 12 days, B is 25 percent more efficient than A. C alone can do t