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25 persons can finish a work working 6 hours a day in 18 days. In how many days working 5 hours a day, 20 persons can finish the same work?
1. 20
2. 22
3. 24
4. 27

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Correct Answer - Option 4 : 27

Given:

M1 = 25 persons, D1 = 18 days, H1 = 6 hours 

M2 = 20 persons, H2 = 5 hours 

Formula used:

M1D1H1 = M2D2H2

M → Number of men, D → Day and H → Hours

Calculation:

M1D1H1 = M2D2H2

⇒ 25 × 18 × 6 = 20 × D2 × 5

⇒ D2 = 27 days

∴ The number of days they will finish the work is 27 days 

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