3 men took 4 days how much will 4 men take?

If 3 men take 4 days to complete a task, the total work can be expressed as 3 men × 4 days = 12 man-days. To find out how long it will take 4 men to complete the same task, we divide the total work by the number of men: 12 man-days ÷ 4 men = 3 days. Therefore, 4 men will take 3 days to complete the task.