SOLUTION: A does 4/5 of a work in 20 days.He then calls in B and together finish the remaining work in 3 days. how long B would take to do the whole work?

Question 673310: A does 4/5 of a work in 20 days.He then calls in B and together finish the remaining work in 3 days. how long B would take to do the whole work?

Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!

 

Hi,

A does 4/5 of a work in 20 days.  1/25 per day 

 In 3 days then 3/25 of work:   1/5 - 3/25 = 2/25 left for B to do in 3 days

  

 B can do 2/75 of the total work in one day. 

  37 1/2 days to do the whole work 

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