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A group of workers estimate to finish a work in 10 days, but 5 workers could not join the work. If the rest of them finished the work in 12 days, the number of members present in the team originally is
1. 50
2. 45
3. 35
4. 30

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Correct Answer - Option 4 : 30

Given:

Group of workers estimate to finish a work in 10 days

5 workers could not join the work

Work is finished in 12 days

Calculation:

Let the number of workers present in the team be x 

Total work = x × 10 = 10x

When 5 workers did not join 

Number of workers = x - 5

Work is finished in 12 days 

Now,

10x = (x - 5) × 12

⇒ 10x = 12x - 60 

⇒ 2x = 60 

⇒ x = 30 

∴ Number of workers present in the team were 30

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