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Time and Work


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  • 3 weeks later...

1. 2M+5W---> take 4*3 =12 days to complete the work;

 

2. 3M+5W---> take 4*2 =8 days to complete the work; (1 man joined and 1/4th of the work was done in 2 days)

 

=> 2M+5W---> can do 1/12th work in 1 day------(1)

 

=> 3M+5W---> can do 1/8th work in 1 day----(2)

 

Subtracting (2) from (1), we get 1 man can do 1/24th work in 1 day or 1 man takes 24 days to complete the work.

 

It means that to complete the work in 4 days, 24/4=6 men are needed.

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