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A can do a piece of work in 10 days, B can do it in 12 days and C can do it in 15 days. In how many days will A, B and C finish it, working all together?
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- 6 days
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5 1 days 4 -
4 4 days 11 - 4 days
Correct Option: D
| A’s 1 day’s work = | 10 |
| B’s 1 day’s work = | 12 |
| C’s 1 day’s work = | 15 |
∴ (A + B + C)’s 1 day’s work
| = | + | + | ||||
| 10 | 12 | 15 |
| = | = | = | ||||
| 60 | 60 | 4 |
∴ Required time = 4 days
