L alone can do a work in 30 days. M alone can do the same in 45 days. L, M and N together can do the same work in 9 days. In how many days can N alone do the work?

L alone can do a work in 30 days. M alone can do the same in 45 days.

1.	L alone can do a work in 30 days. M alone can do the same in 45 days. L, M and N together can do the same work in 9 days. In how many days can N alone do the work?
A.	19
B.	20
C.	18
D.	22
Answer» D. 22

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L alone can do a work in 30 days. M alone can do the same in 45 days. L, M and N together can do the same work in 9 days. In how many days can N alone do the work?

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