A can build up a wall in 8 days while B can break it in 3 days. A has worked for 4 days and then B joined to work with A for another 2 days only. In how many days will A alone build up the remaining part of the wall ?
\({ \text{6}}\frac{1}{3}{ \text{ days}}\)
7 days
\({ \text{7}}\frac{1}{3}{ \text{ days}}\)
\({ \text{13}}\frac{1}{3}{ \text{ days}}\)
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