A and B can do a piece of work in 6 days, B and C in 8 days, C and A in 12 days. How long will C take to do it?  Choose the correct choice from the following
A) 48 days B) 55 days C) 24 days D) 33 days E) 40 days

Rationale: "2 c = 1 / 8 + 1 / 12 – 1 / 6 = 1 / 24 c = 1 / 48 = > 48 days answer : a"
Answer: A