M alone can do a work in 50 days. M is 10% less efficient than N. In how many days can N alone do the same work?

M alone can do a work in 50 days. M is 10% less efficient than N. In h

1.	M alone can do a work in 50 days. M is 10% less efficient than N. In how many days can N alone do the same work?
A.	60
B.	45
C.	40
D.	43
Answer» C. 40

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M alone can do a work in 50 days. M is 10% less efficient than N. In how many days can N alone do the same work?

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