Question

48 Persons can make a bridge in 15 days working 6 hours a day. In how many days will 30 persons working 8 hours a day complete the work?
1. 15 days
2. 10 days
3. 18 days
4. 14 days

Answer 1

Correct Answer - Option 3 : 18 days

Given:

48 Persons make a bridge in 15 days working 6 hours a day.

Concept Used:

M₁ × H₁ × D₁ = M₂ × H₂ × D₂

Where,

M = No of persons

H = Hours of working in a day

D = No of days to complete the work

Calculation:

M₁ × H₁ × D₁ = M₂ × H₂ × D₂

⇒ 48 × 15 × 6 = 30 × 8 × D₂

⇒ D₂ = 18 days

∴ 30 men working 8 hours a day can complete in 18 days.