A is twice as good a workman as B and they took 6 days together to do the work B alone can do it in.
Select the correct option:	A) 18 days	B) 12 days	C) 29 days	D) 25 days	E) 27 days

Rationale: "wc = 2 : 1 2 x + x = 1 / 6 x = 1 / 18 = > 18 days answer : a"
Answer: A