One man, 3 women and 4 boys can do a piece of work in 96 hours, 2 men and 8 boys

One man, 3 women and 4 boys can do a piece of work in 96 hours, 2 men and 8 boys can do it in 80 hours, 2 men & 3 women can do it in 120 hours. 5 Men & 12 boys can do it in how many hours?

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