If A does a job in 5 days and B does a job in 6 days, then A, B will do the job in how many days?
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Answer:
assume our total work is 1
a's work in one day =1/5
b's work in one day=1/6
total work done by them in 1 day =1/5+1/6 =11/30
let the work will be done in x days
we have assumed our total work is 1
then,
11/30×x=1
x = 30/11
hence ans is 30/11
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