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5 skilled workers can build a wall in 20 days; 8 semiskilled workers can build a wall in 25 days; 10 unskilled workers can build a wall in 30 days. If a team has 2 skilled, 6 semiskilled and 5 unskilled workers, how long will it take to build the wall?
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- 20 days
- 18 days
- 16 days
- 15 days
- 20 days
Correct Option: D
5 skilled workers build wall in 20 days
∴ 1 skilled worker build wall in 20 × 5 days
| Hence in 1 day,part of work done by skilled work = | ||
| 100 |
| Similarly in 1 day part of work done by semi-skilled workers = | ||
| 25 × 8 |
| and in 1 day part of work done by un-skilled worker = | ||
| 30 × 10 |
| So part of work done in 1 day by 2 skilled, 6 semiskilled and 5 unskilled = | + | + | = | |||||
| 100 | 200 | 300 | 15 |
So work done by given workers in days = 15
