60 men can complete a work in 40 days. They start work together but after every 10 day, 5 men leave the work. In how many days will the work be completed?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 47.5
According to the question
Total work = 60 men * 40 days = 2400
first day work = 60 * 10 = 600
second day work = 55 * 10 = 550
third day work = 50 * 10 = 500
fourth day work = 45 *10 = 450
Fifth day work = 40 * 7.5 = 300
Total work = 600 + 550 + 500 +450 + 300 = 2400
Hence, the work will be completed = 10 + 10 +10 +10 + 7.5 = 47.5 days