| A can complete a piece of work in 12 days. A and B together can complete the same piece of work in 8 days. In how many days can B alone complete the same piece of work? |
A) 15 days
B) 18 days
C) 24 days
D) 28 days
E) None of these
Correct Answer: C
Solution :
| A's 1 day's work \[=\frac{1}{12}\] |
| \[(A+B)'s\]1 day's work \[=\frac{1}{8}\] |
| \[\therefore \] B's 1 day's work \[=\frac{1}{8}-\frac{1}{12}=\frac{3-2}{24}=\frac{1}{24}\] |
| \[\therefore \] B alone can do the work in 24 days, |
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