43 pls sir I have problem

Dear student,

Let the original no. of men = x.

Number of days taken by the first group = 50days.

Number of days taken by the second group = 50-10=40 days

 

Number of less days, that is, the work completed earlier =10 days.

 

It is an inverse variation.

 

Now,

 

Thus, the original no. of men = x= 28 

Regards

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