Multiple choice

If $20$ men working together can finish a job in $20$ days, find the number of days taken by $25$ men of the same capacity to finish the job.

  1. $25$
  2. $20$
  3. $16$
  4. $12$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Using the formula M1*D1 = M2*D2. 20 * 20 = 25 * D2. 400 = 25 * D2. D2 = 400 / 25 = 16.

AI explanation

Using the formula for inverse proportionality of men and days, the total work is measured as 20 men multiplied by 20 days, which equals 400 man-days. Dividing this total work by 25 men yields 16 days to complete the job.

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