Question

$12$ workers can complete a piece of work in $10$ days. If the number of workers are reduced to $\frac{1}{3}rd$ of the original number, then how many more days would be required to complete the same work?

• A. $3$
• B. $5$
• C. $15$
• D. $20$

Answer 1

Answer: (D)

$20$

12 workers can complete a piece of work in 10 days

I/3 rd of original No's of workers = 12*1/3 = 4 workers

No of workers reduced then more no days are required

12*10÷ 4 = 30

Ans = 30 days

hence 20 days more