A can do piece of work in 30 days while B alone can do it in 40 days. – McqOptions

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1.	A can do piece of work in 30 days while B alone can do it in 40 days. In how many days can A and B working together do it?
A.	17 1/7 days
B.	17 2/7 days
C.	15 2/3 days
D.	15 2/7 days
Answer» B. 17 2/7 days

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