Question

25 men can complete a task in 4 days. How many days does it take for 20 men to complete the same task?

• A. 4
• B. 6
• C. 5
• D. 3

Answer 1

The correct option is C

5

Let the number of days taken by 20 men to complete the task be D days.
When the number of workers decreases, the number of days taken by them to complete the task increases. Hence, this is a case in indirect proportionality.
So, we get the equation as:
25 men x 4 days = 20 men x D days
$\therefore$ Number of days required = D $=\frac{25men\times 4days}{20men}=5days$