If 10 persons can do a job in 20 days. Then 20 persons with the twice

1.	If 10 persons can do a job in 20 days. Then 20 persons with the twice efficiency can do the same job in:1. 152. 103. 54. 20
Answer» Correct Answer - Option 3 : 5 Given: 10 person complete a work in 20 days Formula used: Total work = Time × Efficiency × Men Calculation: Let efficiency of men be 'a'. and the time is taken to complete the work be 'w' Total work = Time × Efficiency × Men ⇒ Total work = 20 × a × 10 ----(i) Now after work efficiency is doubled Total work = Time × Efficiency × Men ⇒ Total work = w × 2a × 20 ----(ii) equating equation 1 and 2 ⇒ 20 × a × 10 = w × 2a × 20 ⇒ w = (20 × a × 10)/(2a × 20) ⇒ w = 5 ∴ 20 persons will complete the same work in 5 days.

If 10 persons can do a job in 20 days. Then 20 persons with the twice efficiency can do the same job in:1. 152. 103. 54. 20

Answer» Correct Answer - Option 3 : 5

Given:

10 person complete a work in 20 days

Formula used:

Total work = Time × Efficiency × Men

Calculation:

Let efficiency of men be 'a'.

and the time is taken to complete the work be 'w'

Total work = Time × Efficiency × Men

⇒ Total work = 20 × a × 10 ----(i)

Now after work efficiency is doubled

Total work = Time × Efficiency × Men

⇒ Total work = w × 2a × 20 ----(ii)

equating equation 1 and 2

⇒ 20 × a × 10 = w × 2a × 20

⇒ w = (20 × a × 10)/(2a × 20)

⇒ w = 5

∴ 20 persons will complete the same work in 5 days.

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