The efficiency of A, B and C are in the ratio 5 ∶ 6 ∶ 9 Working together, they can complete a work in 18 days. In how many days can B alone complete 25% of that work?

The efficiency of A, B and C are in the ratio 5 ∶ 6 ∶ 9 Working to

1.	The efficiency of A, B and C are in the ratio 5 ∶ 6 ∶ 9 Working together, they can complete a work in 18 days. In how many days can B alone complete 25% of that work?
A.	16
B.	10
C.	18
D.	15
Answer» E.