Question

if 20 men can finish a piece of work in 10 days how many person can finish the same job in 4 days​

Answer 1

If 20 men Finish a piece of work in 10 days...

so

20 People ------------ 10 days

4 days ------------- (?)

so (10*20)/4= 50 men

Hope you understand...

Answer 2

Given:  

20 men can finish a piece of work in 10 days  

To Find:  

The total number of men required such that the same job can be completed in 4 days is?  

Solution:  

The given problem can be solved using the concepts of inverse proportion.

1. Initially, 20 men can finish the  work in 10 days,  

=> Time required by 20 men to complete the job = 10 days,  

=> Time required by 1 man to complete the job = 10 x 20 days = 200 days.  

2. If it takes 200 days for a single man to complete the work,

=>Total Number of men required the work in 4 days = 200/4,

=> Total number of men required the work in 4 days = (4x50)/4,

=> Total number of mean required the work in 4 days = 50 men.

Hence, a total of 50 men are required.