A construction site can work for 14hrs a day. It has two machines A and B respectiveley. A works for 8 hrs a day and B works for 12 hrs a day. A alone can finish work in 30 days and B alone can finish in 20 days. How many dats would it take if both machines are deployed together?

• 12 days as when both employed they work for 20 hours a day so 240 /20 =12 days
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