Thirty persons working 6 hours a day can complete a work in 28 days. How many days will 28 persons take to complete another work which is half times the present work, if they work 9 hours a day?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 10.
Work = 30 persons × 6 hours/day × 28 days = 5040 units
New work = 0.5 × 5040 = 2520 units
Daily output = 28 × 9 = 252 units/day
Days =2520/252 = 10 days