Multiple choice

Mark the correct alternative of the following. $12$ men can finish a piece of work in $25$ days. The number of days in which the same piece of work can be done by $20$ men, is?

  1. $10$ days
  2. $12$ days
  3. $15$ days
  4. $14$ days
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Work = Men * Days. 12 * 25 = 300 man-days. 20 * X = 300, so X = 300 / 20 = 15 days.

AI explanation

By the formula of man-days, the total work is 12 men multiplied by 25 days, equaling 300 man-days. To find the time for 20 men, divide the 300 man-days by 20 men. The result is 15 days.