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  Choose the correct answer:
A) 24 days
B) 27 days
C) 36 days
D) 48 days
E) 50 days
Explanation:   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.   Answer: Option 36 days
<result>C</result>
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