

MCQOPTIONS
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1. |
L alone can do a work in 100 hours. M alone can do the same in 150 hours. L, M and N together can do the same work in 30 hours. In how many hours can N alone do the work? |
A. | 65 |
B. | 60 |
C. | 40 |
D. | 90 |
Answer» C. 40 | |