A) 2 days
B) 3 days
C) 4 days
D) 5 days
Correct Answer: B
Solution :
One day's work of A's \[=\frac{1}{8}\text{th part}\] One day's work of B's \[=\frac{1}{12}\text{th part}\] 3 day's work of A's \[=\frac{3}{8}\text{th part}\] Remaining work of A's \[=1-\frac{3}{8}=\frac{5}{8}\text{th part}\] Together one day's work of A's and B's \[=\frac{1}{8}+\frac{1}{12}\] \[=\frac{3+2}{24}=\frac{5}{24}\] Number of days to finish the work \[=\frac{5}{4}\div \frac{5}{24}=3\,days\]
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