Question: A takes twice as much time as B or thrice as much time as C to finish a piece of work. Working together, they can finish the work in 2 days. B can do the work alone in:
[A].4 days
6 days
8 days
12 days
[A].
[B].
[C].
[D].
Answer: Option B
Explanation:
| Suppose A, B and C take x, | x | and | x | days respectively to finish the work. |
| 2 | 3 |
| Then, | 1 | + | 2 | + | 3 | = | 1 | ||
| x | x | x | 2 |
| 6 | = | 1 | |
| x | 2 |
x = 12.
So, B takes (12/2) = 6 days to finish the work.