Multiple choice

$5$ person complete a certain job in $2$ days. How many days will $10$ person take to finish that job.

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

The total work is 5 people x 2 days = 10 person-days. With 10 people working at the same rate, the time required is 10/10 = 1 day.

AI explanation

This problem uses the inverse proportionality of workers and time, calculated via the formula M1 times D1 equals M2 times D2. Substituting the given values gives 5 persons times 2 days equal to 10 persons times D2 days. Solving for D2 gives 10 divided by 10, which equals 1. The required time is 1 day.

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