A and B can do a piece of work in 10 days; B and Cin 15 days; C and A in 18 days. In how many days can B alone do it?
30 days
20 days
12 days
18 days
A and B can do a piece of work in 10 days; B and Cin 15 days; C and A in 18 days. In how many days can B alone do it?