Question

A and B working separately can do piece of work in 9 to 12 day respectively. if they work for a day alternately a starts the work in how many days will the work be conpleted

Answer 1

Hey mate

Your answer :---

'A' can do a work in 9 days.
A's one day work = 1/9

'B' can do a work in 12 days
B's one day work = 1/12

Now,
(A and B) 's one day work = 1/9+1/12 = 4+3/36 = 7/36

Hence A and B can do a work in 36/7 = 5+1/7 days ans.


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