30 men can do a work in 40 days. When should 20 men leave the work so that the entire work is completed in 40 days after they leave the work?

30 men can do a work in 40 days. When should 20 men leave the work

1.	30 men can do a work in 40 days. When should 20 men leave the work so that the entire work is completed in 40 days after they leave the work?
A.	5 days
B.	10 days
C.	15 days
D.	20 days
Answer» C. 15 days

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30 men can do a work in 40 days. When should 20 men leave the work so that the entire work is completed in 40 days after they leave the work?

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