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20 days eiffciency ratio 2:1
akak386pad0az:
please explain
let the total work 60 units , A works for 15 days@2 means 30 units done and now B done the remaining 30 units in 30 days @ the efficiency of 1 unit per day . hence total efficiency = 3units per day A( 2 ) and B( 1) now 60 units divided by 3 = 20 days
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