Question:If `20` men working together can finish a job finish a job in `20` days, then the number of days taken by `25` men of the same capacity to finish the job is : 

A `25` 
B `20` 
C `16` 
D `12` 

+ Answer
C 

+ Explanation
More men, less days (Indirect)

`25 : 20 :: 20 : x` or

`25x = 20 xx 20` or

`x = ((20 xx 20)/(25))`

`= 16`.

`:.`Required number of days

`= 16`

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Md. Habib Ullah

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