If 12 people can print 540 identical books in 10 days, then how many more people will be required to print 720 such books in 8 days?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 8.
Men × Days × Efficiency = Work
12 × 10 × E = 540
E = 540 ÷ (12 × 10) = 4.5 books per person per day
Now required: 720 books in 8 days
Let number of people = x
x × 8 × 4.5 = 720
x = 720 ÷ (8 × 4.5) = 20
Required more people = 20 − 12 = 8