L alone can complete a work in 200 hours. M alone can complete the same work in 150 hours. L, M and N together can complete the same work in 60 hours. In how many hours can N alone complete the work?

L alone can complete a work in 200 hours. M alone can complete the sam

1.	L alone can complete a work in 200 hours. M alone can complete the same work in 150 hours. L, M and N together can complete the same work in 60 hours. In how many hours can N alone complete the work?
A.	200
B.	240
C.	180
D.	120
Answer» B. 240

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L alone can complete a work in 200 hours. M alone can complete the same work in 150 hours. L, M and N together can complete the same work in 60 hours. In how many hours can N alone complete the work?

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