A works twice as fast as B. if both of them can together finish a piece of work in 12 days, then B alone can do it in
A). 24 days
B). 27 days
C). 36 days
D).
48 days
36 days
B = 2A
2A × A/3A = 12
2A/3 = 12
A = 18 days
B = 2 × 18 = 36 days
Therefore, B alone can finish the work in 36 days.