It took 25 men to complete a job in 60 hours , how long it will takes 20 mens to complete it?

To find out how long it will take 20 men to complete the job, we can use the formula:

Men x Hours = Constant

So, for 25 men completing the job in 60 hours:
25 x 60 = 1500

Now, we can use this constant to find out how long it will take 20 men to complete the job:
20 x Hours = 1500
Hours = 1500 / 20
Hours = 75

Therefore, it will take 20 men 75 hours to complete the job.