Question

A complete a work in x day and B complete the same work in y days the number of days the will take to do the whole work together​

Answer 1

Answer:

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Answer 2

Step-by-step explanation:

no of days taken by A = x

efficiency of A = 1/x

no of days taken by B = y

efficiency of B = 1/y

total efficiency = 1/x + 1/y

= (x + y) /xy

days they need altogether = 1 / (x +y)