Question

15 men working 8 hours a day can build a wall in 20 days in how many days will 20 men build the same wall working 5 hours a day?

Answer 1

24 days required to complete the work

Answer 2

Answer:

20 men will build the same wall working 5 hours a day in 24 days

Step-by-step explanation:

Given ,

Number of men = 15

Working Time = 8 hours

No of working days = 20 days

Now,

As per another data set :

Number of men = 20

Working Time = 5 hours

No of working days = ?

Since we know,

M₁ × D₁ × H₁ = M₂ × D₂× H₂

Where M₁  is initial no. of Men,

D₁  is initial no. of days and

H₁  is initial no. of Hours.

M₂ is changed no. of men

D₂ is changed no. of days and

H₂  is changed no. of Hours.

Now put all the given values in the above formula

15 × 20 × 8 =20 × D₂ × 5

2400 = 100 * D₂

D₂ = 2400 / 100

D₂ = 24 days

Hence,

20 men will build the same wall working 5 hours a day in 24 days