Question

21 workers can construct any wall in 25 days. If 14 more workers are deployed, then in how many days they will complete the whole work ?
1. 21 days
2. 12 days
3. 18 days
4. 15 days

Answer 1

Correct Answer - Option 4 : 15 days

Given:

Number of workers = 21

Days = 25

New workers deployed = 14

Workers after new Joinings = 14 + 21 = 35 

Formula Used:

(Workers₁ × Days₁)/(Work₁) = (Workers₂ × Days₂)/(Work₂)

Calculation: 

(21 × 25)/1 = (35 × Days)/1

By cross multiplication:

⇒ Days = 15 

∴ After deploying 14 new workers work will be done in 15 days.

The correct option is 4 i.e. 15 days