Multiple choice

If 10 persons completed a work in 15 days, the same work can be completed by 15 persons in

  1. 25 days

  2. 15 days

  3. 10 days

  4. 30 days

  5. 12 days
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Work is constant. Using M1D1 = M2D2: 10 * 15 = 15 * D2. D2 = 10 days.

AI explanation

The total work is 150 man-days (10 persons times 15 days). Using the inverse proportion formula M1 times D1 equals M2 times D2, we have 10 times 15 equals 15 times D2. Solving this gives D2 equals 10 days.

Keep practicing — related questions