Multiple choice

To complete a particular task, 3 people take 4 days. If the same work is done by 4 persons, how long will they take to complete the task?

  1. 2 days

  2. 3 days

  3. 4 days

  4. 5 days

  5. 6 days

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This is an inverse proportion problem. 3 people * 4 days = 12 man-days of work. If 4 people do the same work, 12 / 4 = 3 days.

AI explanation

Using the constant product rule for persons and days, the total work equals 3 people multiplied by 4 days, giving 12 units. Dividing this total work by the new number of 4 persons gives 12 / 4. The task will be completed in 3 days.