Multiple choice

If $15$ men complete a task in $3$ days, how many days will $9$ men take to complete it?

  1. $3$
  2. $4$
  3. $5$
  4. $6$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

This is an inverse proportion problem. 15 men * 3 days = 45 man-days. 9 men * x days = 45 man-days. x = 45 / 9 = 5 days.

AI explanation

Using the formula M1 times D1 equals M2 times D2, we have 15 men times 3 days equals 9 men times the unknown days. This gives a total of 45 man-days. Dividing 45 man-days by 9 men results in 5 days.

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