Multiple choice

$12$ men complete a work in $9$ days. After they have worked for $6$ days, $6$ more men join them. How many days will they take to complete the remaining work ?

  1. $2$ days
  2. $3$ days
  3. $4$ days
  4. $5$ days

  5. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Total work = 12 * 9 = 108 man-days. Work done in 6 days = 12 * 6 = 72 man-days. Remaining work = 108 - 72 = 36 man-days. With 12+6 = 18 men, time = 36/18 = 2 days.

AI explanation

The total work is 108 man-days (12 men multiplied by 9 days). In 6 days, the 12 men complete 72 man-days of work, leaving 36 man-days remaining. With 6 more men joining, the total strength becomes 18 men, who will now take 2 days to complete the leftover 36 man-days.

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