A is twice as good workman as B, and together they complete a work in 20 days. In how many days can the work be complete by B alone?	Options.
A) 35 days
B) 65 days
C) 45 days
D) 60 days
E) 95 days
B=3A   60 days   60 days
<result>D</result>
A is twice as good workman as B, and together they complete a work in 20 days. In how many days can the work be complete by B alone?