A alone can do a piece of work in 15 days. A is 20% less efﬁcient than B. In how many days can B do the work alone?

A alone can do a piece of work in 15 days. A is 20% less efﬁcient th

1.	A alone can do a piece of work in 15 days. A is 20% less efﬁcient than B. In how many days can B do the work alone?
A.	12
B.	18
C.	20
D.	24
Answer» B. 18

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A alone can do a piece of work in 15 days. A is 20% less efﬁcient than B. In how many days can B do the work alone?

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