A) \[10\frac{1}{3}\,\,\text{days}\]
B) \[12\frac{2}{3}\,\,\text{days}\]
C) \[13\frac{1}{3}\text{days}\]
D) \[8\frac{1}{4}\,\,\text{days}\]
Correct Answer: C
Solution :
Remaining work \[=1-\frac{7}{10}=\frac{3}{10}\]part \[\therefore \] (A + B) take 4 days to do \[\frac{3}{10}\]of work \[\therefore \] (A + B) will do the work in \[4\times \frac{10}{3}\]days \[=\frac{40}{3}=13\frac{1}{3}\]days
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