Question:
A, B and C can complete a piece of work in 24, 6 and 12 days respectively. Working together, they will complete the same work in:
[A].
4 days
A, B and C can complete a piece of work in 24, 6 and 12 days respectively. Working together, they will complete the same work in:
[A].
| 1 | day |
| 24 |
[B].
| 7 | day |
| 24 |
[C].
| 3 | 3 | days |
| 7 |
[D].
Answer: Option C
Explanation:
| Formula: If A can do a piece of work in n days, then A’s 1 day’s work = | 1 | . |
| n |
| (A + B + C)’s 1 day’s work = | 1 | + | 1 | + | 1 | = | 7 | . | ||
| 24 | 6 | 12 | 24 |
| Formula: If A’s 1 day’s work = | 1 | , | then A can finish the work in n days. |
| n |
| So, all the three together will complete the job in | 24 | days | = | 3 | 3 | days. | 7 | 7 |