A) 27 days

**B) 54 days**

C) 56 days

D) 68 days

Let: B= x and A= 2x

(A+B) 18 days work = 1

(A + B) one day work= 1/18

So:

x + 2x =1/18

⇒ x = 1/54

So A=27 and** B= 54**

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