30 persons can do a piece of work in 24 days. How many more people are required to complete the work in 20 days?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 6
Total work days = 24 × 30 = 720 workdays
⇒ Number of persons required to do the work in 20 days = 720/20
⇒ 36 persons
⇒ Extra = 36 - 30 = 6 persons