Multiple choice

24 workers working 8 hours/day complete a work in 18 days. 30 workers working 6 hours/day will complete two-third of the work in how many days.

  1. 15 days

  2. 18 days

  3. 14.4 days

  4. 12.8 days

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Total work = 24 × 8 × 18 = 3456 worker-hours. Two-thirds of this work = 2304 worker-hours. With 30 workers working 6 hours/day: 30 × 6 × d = 2304, so d = 2304/180 = 12.8 days.