A can do 1/5th of a work in 4 days and B can do 1/6th of the same work in 5 days. In how many days they can finish the work, if they work together?

A can do 1/5th of a work in 4 days and B can do 1/6th of the same work

1.	A can do 1/5th of a work in 4 days and B can do 1/6th of the same work in 5 days. In how many days they can finish the work, if they work together?
A.	12
B.	20
C.	15
D.	30
Answer» B. 20

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A can do 1/5th of a work in 4 days and B can do 1/6th of the same work in 5 days. In how many days they can finish the work, if they work together?

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