A takes twice as much time as B or thrice as much time to finish a piece of work. Working together, they can finish the work in 2days. B can do the work alone in?  Select:
A) 8
B) 10
C) 12
D) 15
E) 20
Suppose A,B,12 takes x,x/2,x/3 hours to finish the work   Then, 1/x + 2/x + 3/x = 1/2   6/x = 1/2   x = 12   Answer is 12
<result>C</result>
A takes twice as much time as B or thrice as much time to finish a piece of work. Working together, they can finish the work in 2days. B can do the work alone in?