A and B separately can build a wall in 12 and 16 days, respectively. If they work for 1 day alternatively, starting with A, in how many days will the wall be built?

A and B separately can build a wall in 12 and 16 days, respectively. I

1.	A and B separately can build a wall in 12 and 16 days, respectively. If they work for 1 day alternatively, starting with A, in how many days will the wall be built?
A.	\(7{2\ \over3}\) days
B.	\(13{2\ \over3}\) days
C.	\(12{2\ \over3}\) days
D.	\(6{2\ \over3}\) days
Answer» C. \(12{2\ \over3}\) days

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A and B separately can build a wall in 12 and 16 days, respectively. If they work for 1 day alternatively, starting with A, in how many days will the wall be built?

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