Multiple choice

Some persons can do a piece of work in $12$ days. Two times the number of such persons will do half of that work in __________.

  1. $6$ days
  2. $4$ days
  3. $12$ days
  4. $3$ days
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Work = Persons * Days. If P persons do W work in 12 days, 2P persons do W work in 6 days. Therefore, 2P persons do half the work (W/2) in 3 days.

AI explanation

Using the work formula, (men1 * days1) / work1 = (men2 * days2) / work2. Let the initial number of persons be P, so (P * 12) / 1 = (2P * days2) / (1/2). Simplifying this yields 12P = 4P * days2, which gives days2 = 3. The work is completed in 3 days.

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